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

$\text{C}_2\text{H}_5\text{Br} \xrightarrow{\text{KCN}} [\text{A}] \xrightarrow[\text{[4H]}]{\text{LiAlH}_4} [\text{B}] \xrightarrow[0^\circ-5^\circ\text{C}]{\text{HNO}_2} [\text{C}]$

$\text{C}_2\text{H}_5\text{CONH}_2 \xrightarrow{\text{Br}_2/\text{KOH}} [\text{A}] \xrightarrow{\text{CHCl}_3 + \text{KOH}} [\text{B}] \xrightarrow{\text{Na}/\text{C}_2\text{H}_5\text{OH}} [\text{C}]$