Question

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.

Convert to Reported speech, and please explain why you got the answer. (Explanation is very important)

Answer 1

Answer:

i asked him why he was working so hard