Concept:The sentence uses past tense in part (a) (“was”), so part (b) must also be in past tense to maintain consistency.
Explanation:The verb “was” in part (a) indicates a past action.
Therefore, the verb in part (b) should also be in a past tense form.
The phrase “that has ever been” uses the present perfect tense (“has”).
This is incorrect because the speech was already made in the past.
The correct tense is past perfect: “that had ever been”.
Past perfect is used for an action completed before another past action.
Here, the speech was made before the moment of speaking in the past.
So the correct sentence is: “It was one of the best speeches that had ever been made in the Parliament.”
Thus the error lies in part (b).
Answer:(b)