Q.Colostrum provides (A) Naturally acquired active immunity (B) Naturally acquired passive immunity (C) Artificially acquired active immunity (D) Artificially acquired passive immunity

Step 1. Passive immunity means antibodies are transferred into an individual from an outside source, rather than the individual's own immune system producing them.

Step 2. Colostrum, the first milk produced after childbirth, is rich in maternal antibodies that pass to the newborn.

Step 3. Because the infant receives these ready-made antibodies rather than generating an immune response itself, this is passive immunity, not active immunity.

Step 4. Because the transfer happens naturally through breastfeeding/colostrum (not via a medical antibody injection), it is naturally acquired passive immunity rather than artificially acquired.

Identify whether antibodies are self-produced (active) or received (passive), and whether transfer is natural or artificial.

• Confusing colostrum's maternal-antibody transfer with active immunity because it occurs 'naturally'
• Assuming any natural process must be 'active'