Which one of the following is true for a binary operation ‘O’ defined on N by aOb = a + b? 

(A) Operation is both associative and commutative. 

(B) Operation is associative but not commutative. 

(C) Operation is commutative but not associative. 

(D) None of these

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1 Answers

Correct answer is (A) Operation is both associative and commutative.

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