Question 6.SSE.31: → (A) → (B) → (C) → (D) Identify A to D....

\begin{matrix} \overset{KCN}{\underset{DM}{\xrightarrow {\hspace{2 cm}} }} & \text (A) \\\\\\\\\\\\\\\ \end{matrix} 

\begin{matrix} \overset{Na ^{-} O ^{-} Et}{\underset{EtOH , PhCHO , \Delta}{\xrightarrow {\hspace{2 cm}} }} \\\\\\\\\\\\\\ \end{matrix}  \begin{matrix} \overset{H_3O^+}{\underset{\Delta}{\xrightarrow {\hspace{2 cm}} }} \\\\\\\\\\\\\\\ \end{matrix}  \begin{matrix} \overset{\text { 1. } SOCl _2}{\underset{\text { 2. } CH _3 NH _2}{\xrightarrow {\hspace{2 cm}} }} \\\\\\\\\\\\\\\ \end{matrix}