Whom does he look for?
A
Whom he is looked after for?
B
Who is looked after for him?
C
Who is looked for by him?
D
Whom he looked after by?
Correct Answer: Who is looked for by him?
Who is looked for by him?We change WHOM into who. Don't forget keeping the ? at the end.
Rule :
Who + helping verb + Subject + V3 + Other objects + ?(question mark).