In a set of reactions, bromoethane yielded a final product 'S'.

The compound 'S' should be

Among the following compounds, the most acidic is :

4-methyl benzamide (A) on reaction with ethanolic solution of $$\mathrm{KOH}$$ and bromine gives another compound (B). The compound (B) on treatment with benzoyl chloride gives compound (C). Identify the correct structure of compound (C) from the following.

A sweet smelling organic compound $$[\mathrm{A}]\left(\mathrm{C}_9 \mathrm{H}_{10} \mathrm{O}_2\right)$$ undergoes acid hydrolysis to form an acid [B].
Compound [B] further reacts with Ammonia followed by heating to yield [C].
Compound $$[\mathrm{C}]$$ when reacted with $$\mathrm{Br}_2$$ in caustic potash gave compound $$[\mathrm{D}]\left(\mathrm{C}_6 \mathrm{H} 7 \mathrm{~N}\right)$$ which gives a white precipitate with aqueous $$\mathrm{Br}_2$$.
Identify compounds $$[\mathrm{A}]$$ & $$[\mathrm{D}]$$