Chemistry - Halogen Derivative Question with Solution | TestHub

A dihydric alcohol contains two hydroxyl (-OH) groups on a benzene ring in the context of phenols.

Catechol is benzene-1,2-diol, resorcinol is benzene-1,3-diol, and hydroquinone is benzene-1,4-diol—each has two hydroxyl groups.

Phloroglucinol is benzene-1,3,5-triol with three hydroxyl groups, making it trihydric rather than dihydric.

Answer: $\boxed{C}$