Answer:-

\[\ce{\underset{\text{Benzyl bromide}}{C6H5 – CH2 – Br} ->[alcoholic KCN]\underset{\text{Phenylacetonitrile} (A)}{C6H5 – CH2 – C ≡ N} ->[Na/ethanol]\underset{\text{2-Phenylethylamine} (B)}{C6H5 – CH2 – CH2 – NH2}}\]