Q:

The doctor said to the patient, "How do you feel now ? Has the pain gone down ?" 

• 1
  The doctor asked the patient how he was feeling then and if the pain was down.
• 2
  The doctor asked the patient how he felt then and if the pain had gone down.
• 3
  The doctor asked the patient how he had felt when the pain was gone.
• 4
  The doctor asked the patient how he is feeling now and if the pain has gone down.