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Let P be the relation defined on the set...

Let P be the relation defined on the set of all real number such that `P = [(a, b) : sec^2 a-tan^2 b = 1]` . Then P is:

A

reflexive and symmetric but not transitive

B

symmetric and transitive but not reflexive

C

reflexive and transitive but not symmetric

D

an equivalence relation

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The correct Answer is:
D
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