Nucleophilic Aromatic substitution `(SN_(Ar))`:
A substituted benzene derivative containing `- NO_(2)` and `Cl` group at `p-`position is subjected to `Nu-` substitution
If step -2 were rate determining step, which halogen of aryl halide is most reactive towards `SN_(Ar)`.
A. Fluoride
B. Chloride
C. Bromide
D. Iodide