The correct structure for hydroquinone is:

The correct answer is Option (3) → 

Reason:
Hydroquinone is benzene-1,4-diol (para-dihydroxybenzene). It has:

• A benzene ring

• Two –OH groups at para (1,4) positions

Options 1 and 2 show quinone structures (C=O groups), not hydroquinone.
Option 4 shows meta-dihydroxybenzene (resorcinol).

Therefore, Option 3 is the correct structure of hydroquinone