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Which statement is false?

Answer and explanation

Correct answer: A symmetric relation must contain every (a,a) pair

The governing concept is symmetry, not reflexivity. A relation R on A is symmetric if, whenever (a,b) belongs to R, the reverse pair (b,a) also belongs to R. The empty relation satisfies this condition vacuously because it has no pair that could violate it. The universal relation A x A contains both directions of every pair, so it is symmetric. A self-pair (a,a) is its own reverse and therefore never creates a symmetry violation. However, symmetry does not require self-pairs for every element; that additional requirement defines reflexivity. Therefore option D is the false statement.

Related tags

Symmetric RelationReflexive RelationFalse StatementRelationsRelations And FunctionsMathematicsClass 12 Mcq

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