Q.________ are mobile traders who deal in low priced articles with no fixed place of business.

A small shop specialising in one line of goods is a single line store, so the answer is (b).

Among small-scale fixed-shop retailers, one type is the single line store — a shop that keeps goods of only one line or category (for example, only stationery, only garments, or only footwear) but of many brands and varieties.

• (a) Market traders operate in periodic markets, not a fixed single-line shop.
• (b) Single line store — correct; deals in a particular line of products. …

Small-scale fixed-shop retailers who specialise in a single category of goods are called single line stores, so that is the correct term.

Among small-scale fixed-shop retailers, a single line store is a small shop that deals in only one line or class of products — for example a shop selling only stationery, only footwear, or only cloth. It offers a good variety within that one line but does not spread across unrelated goods. This contrasts with a general store, which keeps many different lines under one roof.

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The answer is option (c) Itinerant traders.

Itinerant traders are small retailers who do not have any fixed place of business. They move from street to street and place to place carrying their goods with them, generally dealing in low-priced articles of daily use. Hawkers and peddlers, cheap-jacks and market traders are common examples.

• Multiple shops and street-stall merchants have a fixed location. …