Aromaticity Chemistry Of Aromatic Compounds

The anion formed from option (a) has 6 electrons in a cyclic, planar, and conjugated system, satisfying Hückel's rule (4n+2). Thus, it is aromatic.

Ozone (O ) is a powerful oxidizer, and it is known to react with various substances.
The statement in option (d) is not correct because ozone does not react with acidified potassium dichromate (K Cr O ) in this manner.
Instead, ozone is typically involved in oxidation reactions with other substances, but this specific reaction does not occur in this context.
Thus, the correct answer is (d).