Concept:A phenol has a hydroxyl group (
−OH) directly attached to the carbon of an aromatic ring.
Explanation:In options A, B, and C, the
−OH group is directly attached to an aromatic ring, so these compounds are phenols.
In option D, the
−OH group is attached to a side-chain carbon in
−CH2​OH, not directly to the ring.
This side-chain carbon is
sp3 hybridized, making the compound benzyl alcohol.
Benzyl alcohol is an aromatic alcohol but not a phenol.
Answer:Option D