The reduction of which of the following compounds would yield a secondary amine?

$Ph-C \equiv N$ $\xrightarrow[{Partial \ hydrolysis}]{H_3O^\oplus} (A)$ $\xrightarrow{Br_2 + KOH} (B)$
Product $(B)$ is

Identify $A$ and $B$ in the following reaction.
$CH_3Br$ $\xrightarrow{AgNO_2} A$ $\xrightarrow{Sn / HCl} B$

Nitrobenzene combines with hydrogen in the presence of platinum to produce

An aromatic compound '$A$' on treatment with aqueous ammonia and heating forms compound '$B$',which on heating with $Br_2$ and $KOH$ forms a compound $C$ of molecular formula $C_6H_7N$. The structures of compound $A, B$ and $C$ are respectively:

Reaction of propanamide with ethanolic sodium hydroxide and bromine will give