निम्नलिखित अभिक्रिया का मुख्य उत्पाद है। \(\begin{array}{*{20}{c}}
{C{H_3}}\\
{|\,\,\,\,\,}\\
{{C_6}{H_5}C{H_2} - C - C{H_2} - C{H_3}}\\
{|\,\,\,\,\,}\\
{Br\,\,\,}
\end{array}\) \(\xrightarrow[{{C_2}{H_5}OH}]{{{C_2}{H_5}ONa}}\)

1. A \(\begin{array}{*{20}{c}}
   {\,\,C{H_3}}\\
   {\,\,|\,\,\,\,\,\,}\\
   {{C_6}{H_5}C{H_2} - C - C{H_2} - C{H_3}}\\
   {\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,}\\
   {\,\,\,\,\,\,\,\,\,\,O{C_2}{H_5}\,\,}
   \end{array}\)
2. B \(\begin{array}{*{20}{c}}
   {{C_6}{H_5}CH = C - C{H_2} - C{H_3}}\\
   {\,\,\,\,|\,\,\,\,\,\,\,\,\,\,}\\
   {\,\,C{H_3}\,\,}
   \end{array}\,\,\)
3. C \(\begin{array}{*{20}{c}}
   {{C_6}{H_5}C{H_2} - C = CHC{H_3}}\\
   {\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,}\\
   {\,\,\,\,\,\,\,\,\,C{H_3}\,\,}
   \end{array}\,\,\)
4. D \(\begin{array}{*{20}{c}}
   {{C_6}{H_5}C{H_2} - C = C{H_2}}\\
   {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}\\
   {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{H_2}C{H_3}\,\,\,\,}
   \end{array}\,\,\)