The structure of product \( C \), formed by the following sequence of reactions is:\( \mathrm{CH_3COOH} + \mathrm{SOCl_2} \longrightarrow A \xrightarrow[\mathrm{AlCl_3}]{\text{Benzene}} B \xrightarrow[\ -\mathrm{OH}\ ]{\mathrm{KCN}} C \)