The correct option is A Phenol
Phenol is not a substrate/reagent/product of Perkin reaction.
(CH3CO)2O+C6H5CHOCH3COONa−−−−−−−−→C6H5CH=CHCOOH+CH3COOH
In Perkin reaction, benzaldehyde reacts with acetic anhydride in presence of sodium acetate to form cinnamic acid and acetic acid.