Amongst the given set of reactants, the most approprate for preparing `2^@` amine is ……
A. `2^(@)R-Br+NH_(3)`
B. `2^(@)R-Br+NaCN` followed by `H_(2)//Pt`
C. `1^(@)R-NH_(2)+RCHO` followed by `H_(2)//pt`
D. `1^(@)R`-Br(2mol)+potassium phthalimide followed by `H_(3)O^(+)`/heat
