Consider the following reactions involving SN2 mechanism :
A. Nu:- + R - L → R - Nu + L:-
B. Nu: + R - L → R - Nu+ + L:-
C. Nu:- + R - L+ → R - Nu + L:
Which of the above reactions will be accelerated upon increasing solvent ionizing power :
1
Only A
2
Only B
3
Only C
4
Both A and C