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Twenty-seven persons attended a party. Which one of the following statements can never be true?

A. There is a person in the party who is acquainted with all the twenty -six others.

B. Each person in the party has a different number of acquaintances.

C. There is a person in the party who has an odd number of acquaintances

D. In the party, there is no set of three mutual acquaintances.

E. None of the above.

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সঠিক উত্তরঃ E. None of the above.

Explanation: