Correct Answer - B
These reductive aminations are examples of the Leuckart reaction.
`PhCOCH_(3)+overset(+)(N)H_(4)HCbarO_(2)overset(Delta)rarrunderset(1^(@)"amine")(Phoverset(NH_(2))overset(|)(C)HCH_(3))`
`Et_(3)C-O+HCONMe_(2)overset(Delta)rarrEtunderset(3^(@)"amine")(-overset(NH_(2))overset(|)(C)H-Et)`
Aldehydes and ketones with ammonium formate or with formamide to give formy1 derivatives of primary amines (Leuckart reaction) These formy1 derivatives are readily hydrolysed by acid to the primary amine :