MadeEasy Test Series: Set Theory & Algebra - Relations

Question

Comments

$B$ ??

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Answer is B.

R is equivalence.

S is not equivalence because it is not reflexive. It does not contains (a,a), because a line can't be perpendicular to itself.

Answer 1

R is reflexive , symmetric and transitive ,so equivalence relation.

S is only symmetric, so not equivalence relation.

Answer 2

1 is equivalence relation and 2^nd is not equivalence relation.