\(\,(i)\,C - C - C - C - \)
\(\,\,\,(ii)\,C - C - \mathop C\limits^| - C\)
\((ii)\,C - \mathop C\limits_| - \mathop C\limits^| \,\,\,\,\,\)
\(\,(iv)\,C - \mathop {\mathop C\limits^| }\limits_{\mathop |\limits_C } - C\)
આથી, કુલ શક્ય આલ્કીહાઈડ = \(4\)
$\begin{array}{*{20}{c}}
{Me} \\
{|\,\,\,\,} \\
{{H_2}C - N - C - Et} \\
{\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,|\,\,} \\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,Me\,\,\,\,\,C{H_2}C{H_3}}
\end{array}$