`H_(2)C =CH-overset(CH_(3))overset(|)underset(CH_(3))underset(|)(C)-COOH overset(NaOH)underset(CaO // Delta)toX`will be
A. `H_(3)C-CH=overset(CH_(3))overset(|)(C)-CH_(3)`
B. `H_(2)C=CH-overset(CH_(3))overset(|)underset(H)underset(|)(C)-CH_(3)`
C. `H_(3)C-CH=overset(CH_(3))overset(|)(C)-CH_(2)OH`
D. `H_(3)C=CH-overset(CH_(3))overset(|)underset(CH_(3))underset(|)(C)-COONa`
