I said to him," where have you lost the pen I brought for you yesterday ?"

• A. I asked him where he had lost the pen I had brought him yesterday.
• B. I asked him where he had lost the pen I have brought for him the previous day.
• C. I asked him where he had lost the pen I had brought for him the previous day.
• D. I asked him where had he lost the pen I had brought him the previous day.