The forms of revelations are explained in
Q. 40:51
Q. 41:50
Q. 42:51 “It is not given to any human being that Allah should speak to him unless (it be) by revelation, or from behind veil or (that) He send a messenger to reveal what He wills by his leave…” Q. 42:51.
Q. 43:50
Correct answer is C
The forms are explained in Q. 42:51 "It is not given to any human being that Allah should speak to him unless (it be) by revelation, or from behind veil or (that) He send a messenger to reveal what He wills by his leave..." Q. 42:51.