Concept:In active-to-passive transformation, the object becomes the subject, and the tense of the original sentence must remain unchanged.
Explanation:Check each pair carefully.
(A) "Students should respect their elders."
The correct passive is (D): "Their elders should be respected by students."
So A-D is correct.
(B) "They were conducting the interview yesterday."
This is past continuous tense.
The correct passive is (E): "The interview was being conducted by them yesterday."
So B-E is correct.
(C) "The noise surprised everyone."
This is simple past tense.
The passive should be "Everyone was surprised by the noise."
But (F) says "Everyone is surprised," which changes the tense.
So C-F is incorrect.
Among the given options, only B-E is a correct option.
Answer:Option E (B-E)