The correct answer is D. The doctor asked the patient how he is feeling now and if the pain has gone down.
The doctor’s question is in the present tense, “How do you feel now?” This indicates that the doctor is asking about the patient’s current condition. The doctor also asks if the pain has gone down, which indicates that the doctor is aware that the patient was experiencing pain in the past and is now asking if the pain has subsided.
Option A is incorrect because the doctor is not asking about how the patient felt then, but how he feels now. Option B is incorrect because the doctor is not asking about how the patient felt then and if the pain had gone down, but how he feels now and if the pain has gone down. Option C is incorrect because the doctor is not asking about how the patient had felt when the pain was gone, but how he feels now and if the pain has gone down.