d
\(\begin{align}
C{{H}_{3}}\,-\,\,Cl\,\,\xrightarrow{KCN}\,\,\underset{(A)}{\mathop{C{{H}_{3}}\,-\,CN}}\,\,\,\xrightarrow{{{H}_{2}}{{O}^{\oplus }}}\,\underset{(B)}{\mathop{C{{H}_{3}}\,-\,COOH}}\, \\
\xrightarrow{N{{H}_{3}}}\,C{{H}_{3}}\,-\,\,\underset{(C)}{\mathop{CO\overset{\Theta }{\mathop{O}}\,\overset{\oplus }{\mathop{N}}\,{{H}_{4}}\,}}\,\xrightarrow{\Delta }\,C{{H}_{3}}\,-\,\underset{(D)}{\mathop{CON{{H}_{2}}}}\, \\
\end{align}\)