Concept:Benzene-1,4-diol is a dihydroxybenzene with two
−OH groups at positions 1 and 4.
Explanation:The common names of dihydroxybenzenes depend on the relative positions of the hydroxyl groups.
Benzene-1,2-diol is called catechol.
Benzene-1,3-diol is called resorcinol.
Benzene-1,4-diol is known as quinol or hydroquinone.
Pyrogallol is benzene-1,2,3-triol, which has three hydroxyl groups.
Therefore, the common name of Benzene-1,4-diol is quinol.
Answer:Option C. Quinol
