Which of the compound is most reactive towards electrophilic reagent among the given options?

Given data : It is given to identify which is most reactive towards electrophilic reagent, from the given options.

Explanation :
The total electron density is increased by electron-releasing groups, increasing the reactivity of the benzene rings. These groups instruct the incoming group to replace at the ortho and para positions, where they primarily increase the electron density. They are hence known as o, p-directing groupings.
Because they enable more electrophilic replacements in the ring, these groups are sometimes known as activating groups. A benzene ring reacts with o and p substituents.

The directed group determines how well the linked group can give electrons.
Some EDG has the following properties in the following order: $-N{H}_2>-N{R}_2>-OH>-OR>-NHCOR>-R$ We can infer from the preceding order in substituted toluene that the hydroxyl (OH) group donates more electrons than the $NHCOC{H}_3$, $OC{H}_3$, and $C{H}_{3}OH$ groups.
Hence, the correct option (D).