$(CH_3)_2CHCH_2C \equiv N \xrightarrow{HCl,{{H}_{2}}O}$ compound $A \xrightarrow[2.\,{{H}_{2}}O]{1.\,LiAl{{H}_{4}}}$ compound $B \xrightarrow[C{{H}_{2}}C{{l}_{2}}]{PCC}$ compound $C$
- A$\begin{matrix}
\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O \\
\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|| \\
{{(C{{H}_{3}})}_{2}}CH\,C\,C{{H}_{3}} \\
\end{matrix}$ - B$\begin{matrix}
\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O \\
\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|| \\
{{(C{{H}_{3}})}_{2}}CHC{{H}_{2}}\,C\,OH \\
\end{matrix}$ - ✓$\begin{matrix}
\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O \\
\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|| \\
{{(C{{H}_{3}})}_{2}}CHC{{H}_{2}}\,C\,H \\
\end{matrix}$ - D$\begin{matrix}
\,\,\,\,\,\,\,\,O \\
\,\,\,\,\,\,\,|| \\
{{(C{{H}_{3}})}_{2}}CH\,C\,C{{H}_{2}}OH \\
\end{matrix}$

