An ester \((A)\) with molecular formula \(\mathrm{C}_{9} \mathrm{H}_{10} \mathrm{O}_{2}\) was treated with excess of \(\mathrm{CH}_{3} \mathrm{MgBr}\) and the complex so formed was treated with \(\mathrm{H}_{2} \mathrm{SO}_{4}\) to give an olefin \((B)\). Ozonolysis of \((B)\) gave \(a\) ketone with molecular formula \(\mathrm{C}_{8} \mathrm{H}_{8} \mathrm{O}\) which shows positive iodoform test. The structure of \((A)\) is

1. A \(\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{COOC}_{2} \mathrm{H}_{5}\)
2. B \(\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{COOC}_{6} \mathrm{H}_{5}\)
3. C \(\mathrm{C}_{6} \mathrm{H}_{5} \mathrm{COOCH}_{3}\)
4. D \(\text{p}- \text{H} _3 \text{CO} - \text{C} _6 \text{H} _4- \text{COCH} _3\)