Phenyl group attached to oxygen is an electron withdrawing group because of electronegativity of double-bond [negative Inductive effect].The compound is stabilized by Induction when anion is formed in reaction.
નીપન $A$ અને નીપન $B$ માં ઓક્સિજન પરમાણુઓ કુલ સંખ્યા ........... છે. 

