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