The decresing order of reactivity towards `SE` (substitution by electrophile) of the following is :
(I) Nitrobenzene
(II) Chlorobenzene
(III) Toluene
(IV) Benzene.

Options

A. `(I) gt (II) gt (III) gt (IV)`
B. `(IV) gt (III) gt (II) gt (I)`
C. `(III) gt (IV) gt (II) gt (I)`
D. `(I) gt (II) gt (IV) gt (III)`

Answer

C

Explanation

`EDG` increase `SE` reactivity and `EWG` decreases `SE` reactivity. `(III) Ph-CH_3` ( + I and `H.C "effect") gt (IV) (C_6H_6) gt (II) Ph-Cl` ( -I effect, `+ R` effect, but -I effect decides reactivity, whereas `+ R` effects decides orientation, i.e., `o-` and p-directing) `gt (I) (Ph - NO_2) (-I "and -R effects")`.