In a set of reactions, ethylbenzene yielded a product D. The reaction sequence is:
Ethylbenzene → [KOH] → KMnO₄ → B → [Br₂/FeCl₃] → C → [C₂H₅OH, H⁺] → D
The correct structure of product D is: 

Major products A and B formed in the following reaction sequence , are