In order to prepare a `1^(@)` amine from an alkyl halide simulatneous addition of one `CH_(2)` group in the carbon chain, the reagent used as source of nitrogen is______________
A. Sodium ammonia `NH_(2)`
B. Sodium azide, `NaN_(3)`
C. Potassium Chloride, KCN
D. Potassium phthalimide, `C_(6)H_(4)(CO)_(2)N-K^(+)`