Identify the compounds [A], [B] and [C] in the following reactions:

$\text{C}_6\text{H}_5\text{NO}_2 \xrightarrow[\text{Heat}]{\text{Sn / HCl}} [\text{A}] \xrightarrow[0-5^\circ\text{C}]{\text{HNO}_2 + \text{HCl}} [\text{B}] \xrightarrow{\text{CuCN / HCN}} [\text{C}]$

$\text{CH}_3\text{Cl} \xrightarrow{\text{KCN}} [\text{A}] \xrightarrow{\text{LiAlH}_4} [\text{B}] \xrightarrow{\text{CHCl}_3 + \text{alc. KOH}} [\text{C}]$