Which of the following alcohols contains the hydroxy group, at the side chain of the aromatic ring?

Aromatic alcohols are compounds in which the hydroxyl group ($-OH$) is attached to an $sp^3$ hybridized carbon atom of the side chain of an aromatic ring.

For example, benzyl alcohol ($C_6H_5CH_2OH$) is an aromatic alcohol.

If the hydroxyl group is directly attached to the aromatic ring, the compound is classified as a phenol rather than an alcohol.

Thus, aromatic alcohols contain the hydroxy group at the side chain of the aromatic ring.

Answer: aromatic alcohols