In the following questions, a sentence has been given in Direct/Indirect. Out of the four alternatives suggested, select the one which best expresses the same sentence in Direct/Indirect and mark your answer in the Answer Sheet.

I said to him, Why are you working so hard?

A. I asked him why was he working so hard

B. I asked him why he had been working so hard

C. I asked him why he was working so hard

D. I asked him why had he been working so hard

Please do not use chat terms. Example: avoid using "grt" instead of "great".