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On A = {1,2,3}, let R = {(1,1),(2,2),(3,3),(1,2),(2,1)}. Choose the correct statement.

Answer and explanation

Correct answer: R is symmetric and reflexive

For reflexivity on A, all diagonal pairs (1,1), (2,2), and (3,3) must be present; all three are listed, so R is reflexive. For symmetry, every non-diagonal pair must have its reverse. The pair (1,2) is accompanied by (2,1), and diagonal pairs reverse to themselves. Thus R satisfies both properties, making option A correct.

Related tags

Reflexive RelationSymmetric RelationOrdered Pairs

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