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Let S be the set of all real numbers. Th...

Let S be the set of all real numbers. Then , the relation `R = {(a, b) : 1+ ab gt 0}` on S is

A

Reflexive and symmetric but not transitive

B

Reflexive, transitive but not symmetric

C

Symmetric, Transitive but not reflexive

D

Reflexive, transitive and symmetric

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