Change the following from active to passive: The committee had approved the proposal after a lengthy discussion.

Explanation

The correct option is (b). To convert active to passive, we make the object the subject and use the appropriate passive verb form. The active sentence is in Past Perfect tense: “had approved”. Therefore, the passive must be Past Perfect passive: “had been approved”. Structure used: Active voice (Past Perfect): Subject + had + V3 + Object + other words. Passive voice (Past Perfect): Object (as Subject) + had been + V3 + by + Subject + other words. Step-by-step conversion: Object in active: “the proposal” becomes the subject in passive. Verb phrase: “had approved” becomes “had been approved”. Agent: “the committee” is added using “by the committee”. Remaining phrase: “after a lengthy discussion” stays as it is. Thus, the correct passive sentence is: “The proposal had been approved by the committee after a lengthy discussion.” Why other options are incorrect: Option A: “was being approved” is Past Continuous passive; tense is wrong. Option C: “is approved” is Present Simple passive; tense is wrong. Option D: “was approved” is Simple Past passive; it changes Past Perfect to Simple Past. Copyright © 2026 Adda247 So the correct answer is (b)