MCQ
$Ph - COOH + {C_2}{H_5}\mathop O\limits^{18} H \xrightarrow{{Conc.{H_2}S{O_4}}}$ Major product will be
- A$\begin{array}{*{20}{c}}
{Ph - C - O{C_2}{H_5}}\\
{||\,\,\,\,\,\,\,\,\,\,\,}\\
{{O_{18}}\,\,\,\,\,}
\end{array}$ - B$\begin{array}{*{20}{c}}
{{C_2}{H_5} - C - \mathop O\limits^{18} - Ph}\\
{||\,\,\,\,\,\,}\\
{O\,\,\,\,\,\,}
\end{array}$ - C$\begin{array}{*{20}{c}}
{{C_2}{H_5} - C - OPh}\\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}\\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{O^{18}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,}
\end{array}$ - ✓$\begin{array}{*{20}{c}}
{Ph - C - \mathop O\limits^{18} - {C_2}{H_5}}\\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}\\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}
\end{array}$