Interchange the affirmative sentence into negative sentence. Everybody admits that he is very helpful.
AHe denies that he is helpful.
BNobody denies that he is very helpful.
CEverybody denies that he is helpful.
DNone of these .
AHe denies that he is helpful.
BNobody denies that he is very helpful.
CEverybody denies that he is helpful.
DNone of these .
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