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Question

A carbonyl compound P, which gives positive iodoform test, undergoes reaction with MeMgBr followed by dehydration to given an olefin Q.  Ozonolysis of Q leads to a dicarbonyl compound R, which undergoes intramolecular-aldol reaction to give predominantly S.
P=1.MeMgBr−−−−−−−−−−−−−−−2. H+,H2O3. H2SO4/heatQ2.O3/ZnH2O−−−−−−−−ROH−−heatS

The structure of the carbonyl compound P, is


Solution

The correct option is B

Note - Cyclic product will be more stable.

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