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) The reaction is an example of Rosenmund's reduction in which the acid chloride is reduced to an aldehyde
`underset([A])underset(2-"Methylpropanonyl chloride")(CH_(3)-overset(CH_(3))overset(|)(CH)-overset(O)overset(||)(C)-Cl+H_(2)(g))overset(Pb//BaSO_(4))rarrunderset(2-"Methylpropanal")(CH_(3)-overset(CH_(3))overset(|)(CH)-overset(O)overset(||)(C)-H+HCl)`
(iii) This reaction is an example of iodoform reaction and proceeds as follows :