$\begin{array}{*{20}{c}}
{C{H_3}\,\,\,} \\
{|\,\,\,\,\,\,\,\,\,} \\
{C{H_3} - C{H_2} - CH - C{H_2}Br + N{H_3}}
\end{array}\xrightarrow[\begin{subarray}{l}
(Nucleophilic \\
substitution)
\end{subarray} ]{}$ $\begin{array}{*{20}{c}}
{\,\,\,\,\,\,\,\,\,\,C{H_{3\,\,}}\,\,\,} \\
{\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,} \\
{C{H_3} - C{H_2} - CH - C{H_2}N{H_2}}
\end{array}$
$C{H_3}CHO + HCN\xrightarrow[\begin{subarray}{l}
(Nucleophilic \\
addition)
\end{subarray} ]{}C{H_3}CH(OH)CN$
$C{H_3} - CH = C{H_2} + {H_2}O\xrightarrow[\begin{subarray}{l}
(Electrophilic \\
addition)
\end{subarray} ]{{{H^ + }}}\begin{array}{*{20}{c}}
{C{H_3} - CH - C{H_3}} \\
{|\,\,\,\,} \\
{\,OH\,}
\end{array}$
$(a)\;\left(\mathrm{CH}_{3}\right)_{3} \mathrm{CCH}(\mathrm{OH}) \mathrm{CH}_{3} \stackrel{\mathrm{conc.H}, \mathrm{SO}_{4}}{\longrightarrow}$
$(b)\;\left(\mathrm{CH}_{3}\right)_{2} \mathrm{CHCH}(\mathrm{Br}) \mathrm{CH}_{3} \stackrel{\text { alc.KOH }}{\longrightarrow}$
$(c)\;\left(\mathrm{CH}_{3}\right)_{2} \mathrm{CHCH}(\mathrm{Br}) \mathrm{CH}_{3} \xrightarrow[\text { It should be }\left(\mathrm{CH}_{3}\right)_{3} \mathrm{CO}^{-} \mathrm{K}^{+}]{\text { given by } \mathrm{NTA}\left(\mathrm{CH}_{3}\right)_{3} \mathrm{O}^{-} \mathrm{K}^{+}}$
$(d)\;\begin{array}{*{20}{c}}
{{{(C{H_3})}_2}C - C{H_2} - CHO} \\
{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{OH\,\,\,\,\,\,\,\,\,\,\,\,\,\,}
\end{array}\xrightarrow{\Delta }$
આ પ્રક્રિયાઓ પૈકી કઈ પ્રક્રિયા સૈત્ઝેફ નીપજ ઉત્પન્ન કરશે નહીં?