Complete the following reactions by identifying A,B and C.
(i) `A + H_(2)(g)overset(Pb//BaSO_(4))rarr(CH_(3))_(2)CHCHO`
(ii) `CH_(3)-overset(CH_(3))overset(|)underset(CH_(3))underset(|)(C)-underset(O)underset(||)C-CH_(3)+NaOIrarrB+C`

Explanation

(i) `underset((A))(CH_(3)-overset(CH_(3))overset(|)(CH)-overset(O)overset(||)(C)-Cl+H_(2(g)))overset(Pd//BaSO_(4))toCH_(3)-overset(CH_(3))overset(|)(CH)-CHO`
(ii) `CH_(3)-overset(CH_(3))overset(|)underset(CH_(3))underset(|)(C)-overset(O)overset(||)(C)-CH_(3)+NaOI tounderset((B))(CH_(3)-overset(CH_(3))overset(|)underset(CH_(3))underset(|)(C)-overset(O)overset(||)(C)-ONa)+underset((C))(CHI_(3))`