$\,(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 = $4$