A. Ahmad asked the magician what he had done to deserve so severe a blow
B. Ahmad said to the magician that what I have done to deserve so severe a blow
C. Ahmad asked the magician what I have done to deserve so severe a blow
D. Ahmad asked the magician what he has done to deserve to severe a blow
Explanation
The correct indirect speech is: Ahmad asked the magician what he had done to deserve so severe a blow.
Explanation:
In indirect speech, the pronoun "I" becomes "he" (or "she" or "they" depending on the subject), and the verb tense changes to the past perfect (had done) to indicate that the action happened before the time of speaking.