Amongst the given set of reactants, the most appropriate for preparing `2^(@)` amine is..

Options

A. `2^(@)R-Br+NH_(3)`
B. `2^(@)R-Br+NaCN"followed by" H_(2)//Pt`
C. R-NH2+R-CHO gives R-NH-CH2-R
D. None of these

Answer

C

Explanation

Chemical transformation can be shown as

While other given set of reactants give primary amine only.