Match the vitamins given in Column I with the deficiency disease they cause given in Column II. Column I (Vitamins): (A) Vitamin A; (B) Vitamin B$_1$; (C) Vitamin B$_{12}$; (D) Vitamin C; (E) Vitamin D; (F) Vitamin E; (G) Vitamin K. Column II (Diseases): (1) Pernicious anaemia; (2) Increased blood clotting time; (3) Xerophthalmia; (4) Rickets; (5) Muscular weakness; (6) Night blindness; (7) Beri-beri; (8) Bleeding gums; (9) Osteomalacia.

Match the vitamins given in Column I with the deficiency disease they cause given in Column II. Column I (Vita

NCERT Exemplar · Q63

_1

(1) Pernicious anaemia;

(2) Increased blood clotting time;

(3) Xerophthalmia;

(4) Rickets;

(5) Muscular weakness;

(6) Night blindness;

(7) Beri-beri;

(8) Bleeding gums;

(9) Osteomalacia.

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Concept understanding — Vitamin Classification

Water Soluble Vitamins: The First Meeting

Imagine you drop a spoonful of sugar into a glass of water. It dissolves completely, disappears into the liquid, and you can't see it anymore — but it's still there, molecule by molecule, spread evenly throughout the water. That's exactly what "water soluble" means: the substance mixes with water at the molecular level.

Now, a vitamin is a tiny organic compound your body needs in small amounts to function properly — it helps enzymes do their jobs, keeps your skin healthy, helps you see, and so on. Your body cannot make most vitamins on its own, so you must get them from food.

Put the two together: a water soluble vitamin is a vitamin that dissolves in water. This single property — solubility — determines almost everything about how these vitamins behave in your body.

The Precise Statement

Water soluble vitamins are vitamins that dissolve in water, are not stored in significant amounts in the body, and are excreted in urine when consumed in excess. They must be consumed regularly (daily or almost daily) to prevent deficiency.

The group includes the B-complex vitamins (B1, B2, B3, B5, B6, B7, B9, B12) and Vitamin C. That's 9 vitamins total.

Why Solubility Matters So Much

Think about fat. Fat and water don't mix — oil floats on top of water. Fat soluble vitamins (A, D, E, K) behave like oil: they dissolve in fat, get stored in your liver and fatty tissues, and can stay in your body for weeks or months. You don't need them every single day.

Water soluble vitamins are the opposite. Because they dissolve in water, they travel freely in your blood (which is mostly water). But your kidneys are constantly filtering your blood and removing excess water-soluble substances into urine. So if you take more Vitamin C than your body needs right now, the extra gets flushed out within hours.

Watch out

This does not mean you can take unlimited amounts safely. Very high doses of some water soluble vitamins (especially B6 and niacin/B3) can cause toxicity — just not as easily as fat soluble vitamins.

The Practical Consequences

You need them frequently — ideally every day. Missing a day won't cause immediate harm, but weeks of low intake will lead to deficiency diseases (scurvy for Vitamin C, beriberi for B1, pellagra for B3, etc.).
Cooking destroys them — because they dissolve in water, boiling vegetables leaches vitamins into the cooking water. If you throw that water away, you lose the vitamins. Steaming or microwaving with minimal water preserves them better.
They are fragile — heat, light, and air can break them down. That's why fresh fruits and vegetables lose vitamin content over time.

The Two Families

| Family | Members | Key Role |

|--------|---------|----------| …

Why this formula?

Vitamin Classification: Understanding the Why Behind the System

Vitamins are organic compounds that our body needs in small amounts for normal metabolism, growth, and health — but cannot synthesize in sufficient quantities. The classification system exists because it helps us understand how vitamins work and why deficiencies cause specific diseases.

Why Are Vitamins Classified This Way?

The primary classification is based on solubility — not chemical structure or function. This is because solubility determines:

How vitamins are absorbed (with fat or water)
How they are transported in the blood
How they are stored in the body
How they are excreted (risk of toxicity)

The Two Major Groups

Group	Key Property	Why This Matters
Fat-soluble vitamins (A, D, E, K)	Dissolve in fats & oils	Require dietary fat for absorption; stored in liver & adipose tissue; can accumulate to toxic levels
Water-soluble vitamins (B-complex, C)	Dissolve in water	Absorbed directly into blood; not stored in significant amounts; excess excreted in urine (low toxicity risk)

The Reasoning Behind Each Group

1. Fat-Soluble Vitamins (A, D, E, K)

Why they are grouped together:

They are nonpolar molecules — they dissolve in lipids, not water.
Absorption requires bile salts and dietary fat (emulsification).
They travel in blood bound to carrier proteins (since blood is water-based).
They are stored in liver and fat tissue — the body can draw on these reserves for weeks or months.

The key formula for remembering them:

All Dogs Eat Kittens

Why this matters for exams:

Deficiency of A → night blindness (retinol needed for rhodopsin)
Deficiency of D → rickets (calcium absorption fails)
Deficiency of E → hemolytic anemia (antioxidant protection lost)
Deficiency of K → bleeding (clotting factors need K)

Toxicity risk: Because they are stored, hypervitaminosis is possible (especially A and D).

2. Water-Soluble Vitamins (B-complex + C)

Why they are grouped together:

They are polar molecules — dissolve readily in water.
Absorption is direct into the bloodstream (no fat needed).
They act as coenzymes — essential helpers for enzyme reactions.
Not stored in significant amounts — excess is excreted in urine.

The key formula for remembering them:

B-complex (B₁, B₂, B₃, B₅, B₆, B₇, B₉, B₁₂) + C

Why this matters for exams:

B₁ (thiamine) → beriberi (energy metabolism fails)
B₃ (niacin) → pellagra (dermatitis, dementia, diarrhea)
B₉ (folate) → neural tube defects in pregnancy
B₁₂ (cobalamin) → pernicious anemia (needs intrinsic factor)
C (ascorbic acid) → scurvy (collagen synthesis fails) …

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This is a matching problem linking vitamins to their classic deficiency diseases. The key is to recall the specific, well-known deficiency for each vitamin — for example, Vitamin A causes night blindness and xerophthalmia, Vitamin B₁ causes beri-beri, and so on. The correct matches are: A→3,6; B→7; C→1; D→8; E→4,9; F→5; G→2.

Why This Approach Works

Vitamin-deficiency diseases are a staple of biology and chemistry exams. The trick isn't memorising every obscure symptom — it's knowing the classic, textbook pairing for each vitamin. For instance, "beri-beri" is almost always paired with Vitamin B₁ (thiamine), and "night blindness" with Vitamin A. Some vitamins cause multiple diseases (like Vitamin D causing both rickets and osteomalacia), and some diseases have only one vitamin cause (like pernicious anaemia with B₁₂). Let's work through each vitamin systematically.

Step-by-Step Matching

1. Vitamin A

This vitamin is essential for vision (as retinal) and epithelial health. Its two hallmark deficiencies are night blindness (impaired dark adaptation) and xerophthalmia (dryness of the cornea, which can lead to blindness).

→ Matches: (6) Night blindness, (3) Xerophthalmia.

2. Vitamin B₁ (Thiamine)

Thiamine is a cofactor in carbohydrate metabolism. Deficiency causes beri-beri, which affects the nervous system and heart.

→ Match: (7) Beri-beri.

3. Vitamin B₁₂ (Cobalamin)

B₁₂ is needed for red blood cell formation and nerve function. Its deficiency leads to pernicious anaemia (due to impaired absorption, often from lack of intrinsic factor).

→ Match: (1) Pernicious anaemia.

4. Vitamin C (Ascorbic acid)

Vitamin C is crucial for collagen synthesis. Deficiency causes scurvy, whose classic sign is bleeding gums (along with poor wound healing).

→ Match: (8) Bleeding gums.

5. Vitamin D

Vitamin D regulates calcium and phosphate metabolism. In children, deficiency causes rickets (soft, deformed bones). In adults, it causes osteomalacia (bone softening).

→ Matches: (4) Rickets, (9) Osteomalacia.

6. Vitamin E (Tocopherol) …

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Method: Direct Association by Biological Function

This method works by recalling the specific physiological role of each vitamin and linking it to the disease caused by its deficiency.

Steps

Recall the primary function of each vitamin (focus on the deficiency symptom, not the full metabolism).
Match the function to the disease description in Column II.
Eliminate duplicates — some diseases may appear for multiple vitamins (e.g., rickets and osteomalacia both involve Vitamin D).

Step-by-step matching

Vitamin	Key function / deficiency effect	Disease in Column II
A	Maintains vision in dim light; deficiency causes night blindness and later xerophthalmia (dryness of cornea)	(6) Night blindness, (3) Xerophthalmia
B $_1$ (Thiamine)	Needed for carbohydrate metabolism; deficiency causes beri-beri (nerve and heart issues)	(7) Beri-beri
B $_{12}$	Required for RBC formation and nerve function; deficiency causes pernicious anaemia	(1) Pernicious anaemia
C	Collagen synthesis, wound healing; deficiency causes bleeding gums (scurvy)	(8) Bleeding gums
D	Calcium absorption and bone mineralization; deficiency in children → rickets, in adults → osteomalacia	(4) Rickets, (9) Osteomalacia

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Here’s a breakdown of the common mistakes students make when matching vitamins to their deficiency diseases, along with how to avoid each.

Mistake 1: Confusing Vitamin A deficiency diseases

The error: Matching Vitamin A with Night blindness (correct) but also with Xerophthalmia (also correct) — or picking only one when the question expects both. Many students forget that xerophthalmia is the advanced, severe form of Vitamin A deficiency that includes night blindness as an early symptom.
How to avoid: Remember the progression: Night blindness (early) → Xerophthalmia (late, includes dryness and corneal damage). In matching questions, if both appear in Column II, Vitamin A matches both (6) and (3). Always check if a vitamin causes more than one listed disease.

Mistake 2: Mixing up Vitamin B₁ and Vitamin B₁₂

The error: Matching Vitamin B₁ (thiamine) with Pernicious anaemia (which is B₁₂ deficiency) or matching Vitamin B₁₂ with Beri-beri (which is B₁ deficiency).
How to avoid: Use a simple mnemonic:
- B₁ → Beri-beri (both start with B)
- B₁₂ → Pernicious anaemia (think “B₁₂ for blood” — it’s needed for RBC formation)
- Never swap these two.

Mistake 3: Confusing Vitamin D deficiency diseases

The error: Matching Vitamin D only with Rickets (children) and forgetting Osteomalacia (adults), or vice versa. Some students think they are different diseases caused by different deficiencies.
How to avoid: Know that both are caused by Vitamin D deficiency — rickets in children (bone deformities), osteomalacia in adults (softening of bones). If both (4) and (9) are in Column II, Vitamin D matches both. Write: “Vitamin D → Rickets (children) + Osteomalacia (adults).”

Mistake 4: Misplacing Vitamin K

The error: Matching Vitamin K with Increased blood clotting time (correct) but confusing it with Vitamin E or Vitamin C. Some students think “K” stands for “clotting” (correct) but then match it to “bleeding gums” (which is Vitamin C).
How to avoid: Remember: K for Koagulation (German spelling). Vitamin K deficiency leads to prolonged clotting time (not bleeding gums). Bleeding gums is a sign of scurvy (Vitamin C deficiency). Keep them separate.

Mistake 5: Confusing Vitamin C and Vitamin K symptoms

The error: Matching Vitamin C with Increased blood clotting time (wrong) or Vitamin K with Bleeding gums (wrong). Both involve bleeding, but the mechanism is different.
How to avoid:
- Vitamin C deficiency → scurvy → bleeding gums, poor wound healing.
- Vitamin K deficiency → delayed clotting → increased clotting time (internal bleeding, not specifically gums).
- Use the phrase: “C for Collagen (gums), K for Clotting (time).”

Mistake 6: Forgetting Vitamin E

The error: Leaving Vitamin E unmatched or matching it with a disease not listed (like infertility). In this specific Column II, the correct match is Muscular weakness (5). …

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Same / Similar Concept — real previous-year questions on the same or a closely similar concept, not this exact question.

Showing the 12 most recent of 16 on this concept.

AP EAPCET 2025Set eng-2025-05-23-AN1 markMCQ
$Q. The deficiency of vitamin (X) causes convulsions. Source of X is Y. What are X and Y? (A) Riboflavin, milk (B) Riboflavin, fish (C) Pyridoxine, curd (D) Pyridoxine, cereals$
›Reveal solutionSolution
This tests recall of a vitamin-deficiency-disease-source table (Biomolecules chapter). The answer is (D).

Concept and Intuition

Each water-soluble/fat-soluble vitamin has a characteristic deficiency disease and characteristic dietary sources, which are standard memorised facts in the biomolecules/vitamins topic.

Step-by-Step Solution

Convulsions as a deficiency symptom is specifically associated with Vitamin B $_6$ (Pyridoxine) deficiency (as opposed to Riboflavin, whose deficiency causes cheilosis/digestive disorders/eye issues).

This rules out options (A) and (B), which name Riboflavin. …
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AP EAPCET 2024Set eng-2024-05-21-AN1 markMCQ
$B_6$
›Reveal solutionSolution
Checking solubility and deficiency disease for each vitamin, only Vitamin D – fat soluble – Rickets is a fully correct match.

Concept and Intuition

Vitamins split cleanly into two solubility classes: fat-soluble (A, D, E, K — stored in body fat, absorbed with dietary lipids) and water-soluble (B-complex and C — not stored, need regular dietary intake). Each vitamin also has a specific, well-defined deficiency disease. A "correctly matched set" question requires BOTH the solubility class and the deficiency disease to be right simultaneously.

Step-by-Step Solution

(A) Vitamin A – Water soluble – Xerophthalmia: Vitamin A is fat-soluble, not water-soluble (it belongs to the A-D-E-K group). The disease Xerophthalmia (dryness of the cornea/conjunctiva, can progress to night blindness) is correctly linked to Vitamin A deficiency, but the solubility is wrong. → mismatch.

(B) Vitamin B₆ – Water soluble – Scurvy: Vitamin B₆ (pyridoxine) is correctly water-soluble, but scurvy is the deficiency disease of Vitamin C, not B₆ (B₆ deficiency instead causes conditions like convulsions in infants, anaemia, and dermatitis). → mismatch on disease.

(C) Vitamin D – fat soluble – Rickets: Vitamin D is correctly fat-soluble, and its deficiency causes Rickets in growing children (bone deformity due to poor calcium/phosphate deposition) — this is the standard, textbook-correct pairing. → fully correct. …
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AP EAPCET 2024Set eng-2024-05-21-FN1 markMCQ
$\mathrm{B_{12}}$
›Reveal solutionSolution
Carrot supplies Vitamin A (via β-carotene) and curd supplies Vitamin B₁₂ (via bacterial fermentation), matching option (A).

Concept and Intuition

Vitamin sources are commonly tested by pairing a familiar food with its characteristic vitamin. Carrot's orange colour comes from β-carotene, the plant-derived precursor the body converts to Vitamin A (important for vision — its deficiency causes night blindness). Curd, being a fermented milk product, is enriched in Vitamin B₁₂ relative to plain milk because the fermenting bacteria synthesise it.

Step-by-Step Solution

Identify carrot's vitamin: β-carotene → Vitamin A.

Identify curd's vitamin: bacterial fermentation of milk enriches Vitamin B₁₂ content.

Match to the option listing A and B₁₂ together.

Common Mistakes …
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AP EAPCET 2024Set eng-2024-05-23-FN1 markMCQ
$Q. The deficiency of vitamin$
(x) causes beri beri and deficiency of vitamin (y) causes convulsions. What are x and y respectively? (A) $\mathrm{B_2}$ , $\mathrm{B_{12}}$ (B) $\mathrm{B_1}$ , $\mathrm{B_{12}}$ (C) $\mathrm{B_2}$ , $\mathrm{B_6}$ (D) $\mathrm{B_1}$ , $\mathrm{B_6}$
›Reveal solutionSolution
This tests memorised vitamin-deficiency disease pairs; beriberi is caused by $\mathrm{B_1}$ (thiamine) deficiency and convulsions by $\mathrm{B_6}$ (pyridoxine) deficiency.

Concept and Intuition

Water-soluble B-vitamins each have a specific coenzyme role, and their deficiency diseases follow directly from which metabolic pathway breaks down without them:

$\mathrm{B_1}$ (Thiamine): coenzyme in carbohydrate metabolism (as thiamine pyrophosphate, needed for pyruvate dehydrogenase and related steps). Deficiency → beriberi (nerve and cardiovascular symptoms — because neurons and heart muscle depend heavily on efficient glucose metabolism).

$\mathrm{B_6}$ (Pyridoxine): coenzyme (as pyridoxal phosphate) in amino acid metabolism, including synthesis of neurotransmitters like GABA. Deficiency disrupts normal neuronal signalling → convulsions.

(For contrast: $\mathrm{B_2}$ /riboflavin deficiency → cheilosis/skin disorders; $\mathrm{B_{12}}$ deficiency → pernicious anaemia.)

Step-by-Step Solution

Identify vitamin (x), whose deficiency causes beriberi: this is the textbook-classic association with thiamine, $\mathrm{B_1}$ .

Identify vitamin (y), whose deficiency causes convulsions: pyridoxine, $\mathrm{B_6}$ , is the NCERT-cited vitamin whose deficiency leads to convulsions (via impaired neurotransmitter synthesis).

So x = $\mathrm{B_1}$ and y = $\mathrm{B_6}$ , matching option (D). …
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AP EAPCET 2023Set eng-2023-05-16-AN1 markMCQ
$Q. Deficiency of which vitamin causes convulsions? (A) Riboflavin (B) Thiamine (C) Ascorbic acid (D) Pyridoxine$
›Reveal solutionSolution
Pyridoxine (Vitamin B6) deficiency is specifically linked to convulsions.

Concept and Intuition

Each B-vitamin deficiency has characteristic clinical symptoms tested commonly in biomolecule chapters: Riboflavin (B2) deficiency causes cheilosis (cracked lips) and eye/skin lesions; Thiamine (B1) deficiency causes beriberi; Ascorbic acid (Vitamin C) deficiency causes scurvy; Pyridoxine (B6) deficiency is specifically associated with convulsions (it's essential for neurotransmitter synthesis).

Step-by-Step Solution

Riboflavin deficiency → cheilosis, digestive problems — not convulsions.

Thiamine deficiency → beriberi (nerve/muscle/heart problems) — not classically "convulsions." …
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AP EAPCET 2023Set eng-2023-05-17-FN1 markMCQ
$Q. Match the following List - I | List - II A. Beri Beri | I. Riboflavin B. Scurvy | II. Thiamine C. Cheilosis | III. Pyridoxine D. Rickets | IV. Ascorbic acid | V. Vitamin D The correct answer is (A) A - III, B - IV, C - III, D - V (B) A - II, B - IV, C - I, D - V (C) A - III, B - V, C - I, D - II (D) A - III, B - V, C - IV, D - II$
›Reveal solutionSolution
This tests matching deficiency diseases to the vitamin whose lack causes them. Answer: A–II, B–IV, C–I, D–V.

Concept and Intuition

Each vitamin deficiency produces a characteristic, well-documented disease. Recognizing these pairings is a matter of biochemical recall: Thiamine (B1) deficiency causes beriberi (nerve/cardiovascular symptoms); Riboflavin (B2) deficiency causes cheilosis (cracking at the corners of the mouth) among other symptoms; Ascorbic acid (Vitamin C) deficiency causes scurvy (bleeding gums, poor wound healing); Vitamin D deficiency causes rickets (bone deformity in children) or osteomalacia in adults.

Step-by-Step Solution

A. Beri Beri is caused by thiamine deficiency → matches List II item II (Thiamine).

B. Scurvy is caused by ascorbic acid (Vitamin C) deficiency → matches List II item IV (Ascorbic acid). …
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AP EAPCET 2023Set eng-2023-05-19-FN1 markMCQ
$\mathrm{B_1}$
›Reveal solutionSolution
This tests classification of vitamins as fat-soluble vs water-soluble; out of A, D, C, B1, K, B6 there are exactly 3 fat-soluble (A, D, K) and 3 water-soluble (C, B1, B6).

Concept and Intuition

Vitamins are classified by their solubility, which determines how the body absorbs, transports, and stores them:

Fat-soluble vitamins: A, D, E, K — absorbed along with dietary fats and can be stored in the body's fatty tissue/liver (so toxicity from excess is more of a concern for these).

Water-soluble vitamins: the B-complex vitamins (B1, B2, B3, B5, B6, B7 [biotin], B9, B12) and vitamin C — these are generally not stored in significant amounts and excess is excreted in urine, so regular dietary intake is needed.

Step-by-Step Solution

List the given vitamins: A, D, C, $\mathrm{B_1}$ , K, $\mathrm{B_6}$ .

Classify each:

A — fat-soluble

D — fat-soluble

C — water-soluble

$\mathrm{B_1}$ — water-soluble (B-complex)

K — fat-soluble …
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AP EAPCET 2022Set ap-2022-07-11-FN1 markMCQ
$Q. Chose the correct statement (A) Vitamin A & K are insoluble in water and can be stored in Adipose tissue (B) Vitamin A & K are soluble in water and can be stored in Adipose tissue (C) Vitamin A & K are soluble in water but cannot be stored in Adipose tissue (D) Vitamin A & K are insoluble in water but cannot be stored in Adipose tissue$
›Reveal solutionSolution
This tests the basic classification of vitamins into water-soluble and fat-soluble groups, and the associated fact that fat-soluble vitamins are stored in adipose tissue.

Concept and Intuition

Vitamins are broadly classified as fat-soluble (A, D, E, K) or water-soluble (B-complex, C). Fat-soluble vitamins dissolve in lipids, are absorbed along with dietary fats, and — because the body has no efficient way to excrete excess lipophilic substances via urine — they accumulate and are stored in adipose (fat) tissue and the liver. Water-soluble vitamins, by contrast, are not stored in significant amounts and excess is excreted in urine.

Step-by-Step Solution

Classify vitamins A and K: both belong to the fat-soluble group (along with D and E).

Fat-soluble vitamins are, by definition, insoluble/poorly soluble in water. …
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AP EAPCET 2022Set eng-2022-07-04-AN1 markMCQ
$Q. Pernicious anemia is caused due to deficiency of which vitamin? (A) B12 (B) B1 (C) B6 (D) B2$
›Reveal solutionSolution
Direct biochemistry recall: pernicious anaemia is the classic disease of vitamin B $_{12}$ deficiency. Answer: B $_{12}$ .

Concept and Intuition

Vitamin B $_{12}$ (cobalamin) is required for DNA synthesis in rapidly dividing cells, including the bone marrow's red blood cell precursors. Its deficiency (often due to lack of "intrinsic factor", a stomach glycoprotein needed for its absorption in the small intestine) leads to defective maturation of red blood cells, producing large, immature, dysfunctional red cells — the condition called pernicious anaemia.

Step-by-Step Solution

Recall the vitamin deficiency diseases: B $_1$ (thiamine) → beriberi; B $_2$ (riboflavin) → cheilosis; B $_6$ (pyridoxine) → convulsions/anaemia (different mechanism); B $_{12}$ (cobalamin) → pernicious anaemia. …
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AP EAPCET 2022Set eng-2022-07-08-FN1 markMCQ
$Q. Thiamine is (A) Nitrogenous base (B) Amino acid (C) Hormone (D) Vitamin$
›Reveal solutionSolution
Thiamine is the common/chemical name of Vitamin B1. Answer: (D) Vitamin.

Concept and Intuition

Vitamins are organic compounds required in small amounts in the diet for normal metabolic function, and each has both a common vitamin-letter name and a specific chemical name. Thiamine is the chemical name given specifically to Vitamin B1, a water-soluble B-complex vitamin. In the body, thiamine is converted into its active coenzyme form, thiamine pyrophosphate (TPP), which plays a central role as a cofactor in carbohydrate metabolism (e.g., in the pyruvate dehydrogenase complex). A deficiency of thiamine/Vitamin B1 causes the disease beriberi, characterized by nerve and cardiovascular problems — a classic NCERT/biomolecules-chapter fact.

Step-by-Step Solution

Identify what thiamine refers to: it is the chemical/common name for a specific water-soluble vitamin.

Recall that thiamine = Vitamin B1 (part of the B-complex group of vitamins). …
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AP EAPCET 2021Set ap-2021-09-07-FN1 markMCQ
$Q. Match the following? Vitamin — Source.$
(a) Vitamin-D —
(i) Fish liver oil.
(b) Vitamin-E —
(ii) Green leafy vegetables.
(c) Vitamin-A —
(iii) Egg yolk.
(d) Vitamin-K —
(iv) Sunflower Oil. (A) (a-iii), (b-ii), (c-iv), (d-i) (B) (a-iv), (b-iii), (c-ii), (d-i) (C) (a-iii), (b-iv), (c-i), (d-ii) (D) (a-iv), (b-ii), (c-iii), (d-i)
›Reveal solutionSolution
This tests recall of standard vitamin-source pairings; the correct match is Vitamin-D→egg yolk, Vitamin-E→sunflower oil, Vitamin-A→fish liver oil, Vitamin-K→green leafy vegetables.

Concept and Intuition

Each fat-soluble vitamin has a textbook-associated primary dietary source used in matching-type questions. Vitamin-A (retinol) is classically tied to fish liver oil (cod-liver oil is the iconic vitamin-A supplement). Vitamin-E (tocopherol) is most abundant in vegetable oils, sunflower oil being a prototypical example. Vitamin-K (phylloquinone) is overwhelmingly sourced from green leafy vegetables (spinach, cabbage) — this is the most universally taught pairing ('K for greens'). Vitamin-D, besides being synthesized via sunlight, is dietarily obtained from animal products like egg yolk.

Step-by-Step Solution

Vitamin-K → green leafy vegetables is the most certain, well-established pairing, which immediately rules out any option pairing K with fish liver oil.

Vitamin-A → fish liver oil is the other very well-established classic pairing.

With A and K fixed to (i) and (ii) respectively, the remaining two sources (egg yolk, sunflower oil) must go to D and E.

Vitamin-E's most emphasized source in nutrition tables is vegetable/seed oils (sunflower oil) — so E → (iv). …
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AP EAPCET 2021Set ap-2021-09-06-FN1 markMCQ
$Q. Deficiency of Riboflavin causes the disease ________ (A) Hemophilia (B) Rickets (C) Beriberi (D) Cheilosis$
›Reveal solutionSolution
Riboflavin ( $B_2$ ) deficiency causes cheilosis — cracking at the corners of the mouth. Answer: (D).

Concept and Intuition

Each water-soluble B-vitamin has a signature deficiency disease tied to its metabolic role. Riboflavin ( $B_2$ ) is a precursor of the coenzymes $FAD$ / $FMN$ , central to cellular oxidation-reduction reactions; its deficiency particularly affects rapidly dividing epithelial tissue such as the skin and mucous membranes around the mouth, producing cheilosis (fissuring at the lip corners), angular stomatitis, and glossitis.

Step-by-Step Solution

Identify riboflavin as Vitamin $B_2$ . …
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←Previous questionQ62 — Which of the following terms are correct about enzymes? (Note: one or …→Next questionQ64 — Match the following enzymes given in Column I with the reactions they …

Q.Match the vitamins given in Column I with the deficiency disease they cause given in Column II. Column I (Vitamins): (A) Vitamin A; (B) Vitamin B1_11​; (C) Vitamin B12_{12}12​; (D) Vitamin C; (E) Vitamin D; (F) Vitamin E; (G) Vitamin K. Column II (Diseases):

Why This Approach Works

Step-by-Step Matching

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Q.Match the vitamins given in Column I with the deficiency disease they cause given in Column II. Column I (Vitamins): (A) Vitamin A; (B) Vitamin B $_1$ ; (C) Vitamin B $_{12}$ ; (D) Vitamin C; (E) Vitamin D; (F) Vitamin E; (G) Vitamin K. Column II (Diseases):

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