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for a compound to be an optically active it must lack plane of symmetry and optically active compounds are resolvable. therefore in q33, all are optically active except A which possess plane of symmetry and is Therefore optically inactive and non-resolvable. similarly in Q34 all compounds except D are optically inactive due to presence of plane of symmetry hence are mesomeric and non-resolvable. compouns D is optically active due to lack of symmetry hence is resovable