The order of reactivity in nucleophilic substitution reaction is
A. `CH_(3)F lt CH_(3)Cl lt CH_(3)I lt CH_(3)Br`
B. `CH_(3)F lt CH_(3)Cl lt CH_(3)Br lt CH_(3)I`
C. `CH_(3)F lt CH_(3)Br lt CH_(3)Cl lt CH_(3)I`
D. `CH_(3)I lt CH_(3)Br lt CH_(3)Cl lt CH_(3)F`