An equimolar mixture of alkylbromide (A) and ammonia gives (B) which on treatment with `NaNO_(2) " and " HCI` gives (C) . Compound (C) on oxidation followed by decarboxylation gives . What (A) ?
A. `CH_(3)CH_(2)CH_(2)Br`
B. `CH_(3)CH_(2)-underset(Br)underset(|)(CH)-CH_(3)`
C. `CH_(3)CH_(2)Br`
D. `CH_(3)-underset(CH_(3))underset(|)(CH)-CH_(2)Br`