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Correct Answer: C) Carbolic acid—Phenol; Catechol—Benzene-1,2-diol; Resorcinol—Benzene-1,3-diol; Hydroquinone—Benzene-1,4-diol; Pyrogallol—Benzene-1,2,3-triol
Carbolic acid is phenol; catechol is benzene-1,2-diol; resorcinol is benzene-1,3-diol; hydroquinone is benzene-1,4-diol; and pyrogallol is benzene-1,2,3-triol.