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Which statement is false?

Answer and explanation

Correct answer: Every symmetric relation is necessarily transitive

Symmetry and transitivity are different relation properties. Symmetry requires a reverse pair: (a,b) in R implies (b,a) in R. Transitivity requires that whenever (a,b) and (b,c) are in R, the pair (a,c) must also be in R. One property does not generally imply the other. For example, on {1,2}, R = {(1,2),(2,1)} is symmetric, but it is not transitive because (1,2) and (2,1) would require (1,1), which is absent. The identity relation is transitive, the empty relation is vacuously transitive, and the universal relation is transitive because all possible pairs are present. Therefore option A is the false statement.

Related tags

Symmetric RelationTransitive RelationFalse StatementRelationsRelations And FunctionsMathematicsClass 12 Mcq

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