Manna asked Rohan, “Have you sat in a trolley bus before?”

The correct answer is D. Manna asked Rohan if he has ever sat in a trolley bus.

Manna’s question is in the present perfect tense, which is used to talk about experiences or events that have happened at some point in the past but are still relevant in the present. In this case, Manna is asking Rohan if he has ever had the experience of sitting in a trolley bus.

Option A is incorrect because it uses the past tense, which would be used to talk about an experience that happened at a specific time in the past. Option B is incorrect because it uses the past participle “sat,” which is used to form the perfect tenses. Option C is incorrect because it uses the simple past tense, which would be used to talk about an experience that happened once and for all at a specific time in the past.