Which of the following is a nucleophilic addition reaction?

Which compound gives lactic acid on hydrolysis after reacting with $HCN$?

The final product $(C)$ in the given reaction sequence is
$C_6H_5COOH$ $\xrightarrow{SOCl_2} (A)$ $\xrightarrow[\text{anhy. } AlCl_3]{C_6H_6} (B)$ $\xrightarrow[\text{(ii) } KOH / (CH_2OH)_2]{\text{(i) } NH_2-NH_2} (C)$

The product $(B)$ is:

In the reaction sequence,
the major products $X$ and $Y$ respectively are

The structure of $(B)$ is