The increasing order of nitration of the following compounds is :

Step-by-step solution

In the given substituted benzene rings, the substitutents methoxy (- OCH ₃ ) and amino (- NH ₂ ) are strongly activating groups while methyl (- CH ₃ ) is weakly activating and chloro (- Cl ) is a deactivating group towards electrophilic aromatic substituation reaction. Since among methyl and methoxy group, methoxy group is more reactive than methyl group, (c) is more reactive than (d). Although amino group is strongly activating group, it gets protonated in presence of acid to form anilinium ion which is strongly d