An ester (A) with molecular formula, C9H10O2 was treated with excess of CH3MgBr and the complex so formed, was treated with H2SO4 to give an olefin (B). Ozonolysis of (C) gave a ketone with molecular formula C8H8O which shows +ve iodoform test. The structure of (A) is
(a) H3CCH2COC6H5
(b) C2H5COOC6H5
(c) C2H5COOC2H5
(d) p-H3CO - C6H4 - COCH3