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$Let R be a relation on a set A such that R = R^{- 1}, then R is$

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Correct option is B

Let (a,b)∈R If (a,b)∈R ⇒(b,a)∈R−1, By def of R−1 ⇒(b,a)∈R,∵R=R−1So, R is symmetric

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Let R be a relation on a set A such that R=R−1 , then R is

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$Let R be a relation on a set A such that R = R^{- 1}, then R is$