$(A)\, CH_3CO_2H$ $(B)\, MeOCH_2CO_2H$
$(C)\,CF_2CO_2H$ $(D)\,$
$\begin{matrix}
O\,\,\,\,\,\,\,\,\,\,\,\,\,\, \\
||\,\,\,\,\,\,\,\,\,\,\,\,\, \\
C{{H}_{3}}-C-Cl-N{{H}_{3}} \\
\end{matrix}$ $\to $ મધ્યવર્તી $\to $ નીપજ
${CH}_{3} {COOH}+{SOCl}_{2} \longrightarrow {A} \xrightarrow[AlCl_3]{Benzene} {B} \xrightarrow[-OH]{KCN} {C}$