\(\mathop {\begin{array}{*{20}{c}}
{H - C - COOH} \\
{||\,\,\,\,\,\,\,\,\,\,\,} \\
{H - C - COOH}
\end{array}}\limits_{Maleic\,acid} \) \(\mathop {\begin{array}{*{20}{c}}
{H - C - COOH} \\
{||\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{HOOC - C - H\,\,\,\,\,\,}
\end{array}}\limits_{Fumaric\,acid} \)
$(I)$ ${C_2}{H_5}\, - \,\,\mathop C\limits_{\mathop |\limits_{C{H_3}} } H\,\, - \,\,{C_3}{H_7}$
$(II)$ ${C_2}{H_5}\, - \,\,\mathop C\limits_{\mathop {||}\limits_O } \,\, - \,\,\mathop C\limits_{\mathop |\limits_{C{H_3}} } H\,\, - \,\,{C_2}{H_5}$
$(III)$ $\begin{array}{*{20}{c}}
{\,\,\,\,\,\,\,\,H} \\
{\,\,\,\,\,\,\,\,|} \\
{H - {C^ \oplus }} \\
{\,\,\,\,\,\,\,\,|} \\
{\,\,\,\,\,\,\,\,H}
\end{array}$
$(IV)$ ${C_2}{H_5}\, - \,\,\mathop C\limits_{\mathop |\limits_{C{H_3}} } H\,\, - \,\,{C_2}{H_5}$
આ સંયોજન માટે કેટલા ભૌમિતિક સમઘટક શક્ય છે?