Find if there is any grammatical error in any part of the sentence below and mark that part as your answer. If there is no error, mark 5 as your answer. His father promised to/ give him anything what he/ wants if he/ passes in the examination.
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Remember this rule: Anything + That, not Anything + What.
The word "what" should never follow a noun or pronoun; it should only be used when the "thing" hasn't been mentioned yet.