COMEDK 2024 Shift 1 Paper

An unsaturated hydrocarbon [A] reacts with HBr in presence of Benzoyl peroxide to yield [B] Compound [A] when reacted with cold, dilute alkaline KMnO4 gave compound [C], 2-Methylbutane-2,3-diol But when [A] is reacted with hot KMnO4, it yielded CH3‌COOH and a compound [D] Identify compounds [A], [B] and [D]