Identify products A and B.
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The Correct Option is C
Solution and Explanation
Step 1: Dil. KMnO4 at 273 K adds two OH groups across the C=C (syn-hydroxylation), giving A = 1-methylcyclopentane-1,2-diol (one tertiary OH on C-1 and one secondary OH on C-2).
Step 2: CrO3 oxidises the secondary alcohol to a ketone, while the tertiary alcohol is untouched, giving B = 2-hydroxy-2-methylcyclopentan-1-one.
This matches option (3). Option (2) would need ring cleavage (hot conc. KMnO4/ozonolysis), and option (4) needs dehydration, which does not happen here.
Answer: (3) A = 1-methylcyclopentane-1,2-diol, B = 2-hydroxy-2-methylcyclopentanone
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