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.
Compare rate of nucleophilic aromatic substitution reaction in following reactants:
A. `Sgt QgtPgtR`
B. `Rgt SgtPgtQ`
C. `Sgt RgtPgtQ`
D. `Pgt SgtRgtQ`