Explanation

(c)
Acetophenone can be prepared by Friedel-Craft’s reaction. By treating benzene with acetyl chloride in presence of anhydrous aluminium chloride acetophenone is obtained.
$C_{6}H_{5}H + ClCOCH_{3}\overset{Anhyd.AlCl_{3}}{\rightarrow}C_{6}H_{5}COCH_{3} + HCl$
Benzene acetyl acetophenone
chloride