Q.A small fixed shop that deals in only children's wear, stocking many designs and sizes within that one product with genuinely expert staff attention, is an example of a:
(A) General Store
(B) Single-Line Store
(C) Speciality Store
(D) Departmental Store

Dealing in only one particular product with deep, expert-attended assortment (narrower than one whole line of goods) is the mark of a speciality store.

A Speciality Store deals in only one particular type of product within a wider line (here, children's wear specifically, rather than garments generally), offering a deep assortment of designs/sizes and genuinely expert, well-informed staff attention within that narrow specialty.

Option-by-option analysis:

• (A) Incorrect — a General Store stocks a wide range of unrelated daily necessities, the opposite of dealing in only one narrow product. …