For a typical nucleophilic aromatic subsitution reaction to take place.
(1) Nucleophilic atom should be of oxygen, nitrogen or sulphur.
(2) Leaving group should be halide .
(3) There should be strong electron withdarwing at ortho and para position to leaving group.
Fastest nucleophilic aromatic substitution reaction take place in :
A.
B.
C.
D.
