Fill in the blank with the most appropriate option.
You are not justified _________ imputing bad motives to me.

Correct option is A

The correct option to fill in the blank is (a) in.
Explanation: The verb phrase “justified in doing something” is the standard construction. It takes the preposition “in” followed by a gerund (-ing form).
Example: He was justified in taking that action.
Why other options are incorrect:
· (b) to: Not used after "justified".
· (c) of: Incorrect preposition.
· (d) on: Doesn’t match the verb phrase construction.
�� Information Booster: Common phrases – “justified in doing something,” “interested in doing something.”