Which order is correct

Options

A. `(i)lt(ii)lt(iii)`
B. `(i)lt(iii)lt(ii)`
C. `(iii)lt(ii)lt(i)`
D. `(ii)lt(iii)lt(i)`

Answer

D

Explanation

Presence of electron releasing group at ortho or para position decreases the rate of nucleophilic substitution reaction. In compound (ii), electron releasing group is present at meta position w.r.t chlorine, so the impact is less but in compound (ii) it is present at ortho position
Thus, the rate of reaction towards nucleophilic substitution is least in compound (ii) and highest in compound (i) as there is no electron releasing group in this compound.