Improve the highlighted part of the sentence. Choose 'No improvement' as an answer if the sentence is grammatically correct.
Find out who is the real actor.

The correct answer is (d) No improvement.
Explanation:
The sentence "Find out who is the real actor" is grammatically correct and does not need any improvement. "Who is the real actor" is properly structured, and no alternative options are better than the original.
Meanings of all options:
· Real actors: Refers to multiple actors, which is incorrect for a singular subject.
· Real acting: Refers to the act of performing, which is not what the sentence is asking for.
· Really actor: "Really" is an adverb and cannot modify a noun like "actor" in this context.
· No improvement: The sentence does not need any changes.