નીચેની કઈ પ્રકિયા માં સાયનાઈડ મુખ્ય નીપજ તરીકે મળે છે ?

Question

A$\begin{matrix} O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\ ||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\ Ph-C-C{{H}_{3}}\xrightarrow[(ii)\,{{H}_{3}}{{O}^{+}}]{(i)\,LiAl{{H}_{4}}} \\ \end{matrix}$
B$\begin{matrix} O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\ ||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\ Ph-C-N{{H}_{2}}\xrightarrow[B{{r}^{2}}]{NaOH} \\ \end{matrix}$
C$\begin{matrix} O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\ ||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\ Ph-C-N{{H}_{2}}\xrightarrow{{{P}_{4}}{{O}_{10}}} \\ \end{matrix}$
D$\begin{matrix} O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\ ||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\ Ph-C-O-H\xrightarrow{SOC{{l}_{2}}}\xrightarrow{N{{H}_{3}}} \\ \end{matrix}$

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Solution

c
$(c)$ $\begin{matrix}
O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
Ph-C-N{{H}_{2}}\xrightarrow[dehydration]{{{P}_{4}}{{O}_{10}}}Ph-C\equiv N \\
\end{matrix}$

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