A carbonyl compound P, which gives positive iodoform test, undergoes reaction with MeMgBr followed by dehydration to give an olefin Q. Ozonolysis of Q leads to a dicarbonyl compound R, which undergo intramolecular aldol reaction to give predominantly S. Poverset(1.MeMgBr)undersetunderset(3.H_(2)SO_(4),Delta)(2.H^(+),H_(2)O)rarrQ overset(1.O_(3))underset(2.Zn,H_(2)O)rarr Roverset(1.OH^(+))underset(2.Delta)rarr S The structure of the products Q and R, respectively, are

A carbonyl compound P, which gives positive iodoform test, undergoes r

1.	A carbonyl compound P, which gives positive iodoform test, undergoes reaction with MeMgBr followed by dehydration to give an olefin Q. Ozonolysis of Q leads to a dicarbonyl compound R, which undergo intramolecular aldol reaction to give predominantly S. Poverset(1.MeMgBr)undersetunderset(3.H_(2)SO_(4),Delta)(2.H^(+),H_(2)O)rarrQ overset(1.O_(3))underset(2.Zn,H_(2)O)rarr Roverset(1.OH^(+))underset(2.Delta)rarr S The structure of the products Q and R, respectively, are
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