An organic compound (A) `(C_(6)H_(10)O)` on reaction with `CH_(3)MgBr` followed by acid treatment gives compound (B). The compound (B) on ozonolysis gives compound (C ), which in the presence of a base gives 1-acetyl cyclopentene (D). The compound (B) on reaction with HBr gives compound (E ). Write the structures of (A), (B), (C ), (D), and (E ). Show how (D) is formed from (C ).

Explanation