If both assertion and reason are true but reason is not the correct explanation of assertion
Because Acetic acid is more acidic than that of phenol because if is attactied. to carboxylic group and in phenol if is Hydroxyl group.
Independently both the statements are correct. but the Reason is not the correct explanation of Assertion.
phenoxide ion is also Resonance stabilised it shows 7 Resonance structure. but in camparison Rarboxylate ion is more stable than ptienoxide.