Which of the following reactions depict the nucleophilic substitition of `C_(2)H_(5)Br` :-
A. `C_(2)H_(5)Br + C_(2)H_(5)SNa rarr C_(2)H_(5)SC_(2)H_(5) +NaBr`
B. `C_(2)H_(5)Br overset(Na+C_(2)H_(5)OH)rarr C_(2)H_(6) +HBr`
C. `C_(2)H_(5)Br +AgCN rarr C_(2)H_(5)NC +AgBr`
D. `C_(2)H_(5)Br +KOH rarr C_(2)H_(5)OH +KBr`
