the incorrect statement with respect to `S_(N^(1) " and " S_(N^(2))` mechanisms for alkyl halide is :
A. a strong nucleophilic in an aprotic solvent increases the rate or favours `S_(N^(2))` reaction
B. a weak nucleophilic and a protic solvent inceases the rate or favours `S_(N^(1))` reaction
C. competing reaction for an `S_(N^(2))` reaction rearrangement
D. `S_(N^(1))` reaction can be cataylsed by some Lewis acids
