Five isomeric para-disubstituted aromatic compounds A to E with molecular formula C8H8O2 were given for identification. Based on the following observation, give structures of the compounds.
(i) Both A and B from a silver mirror with Tollen's reagent; also, B gives a positive test with FeCI3 solution.
(ii) C gives positive idoform test.
(iii) D is readily extracted in aqueous NaHCO3 solution.
(iv) E on acid hydrolysis gives 1, 4-dihydroxybenzene.
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