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WBJEE 2017 Math Solved Paper

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Question : 51

Total: 75

On set A = {1, 2, 3}, relations R and S are given by
R = {(1, 1), (2, 2), (3, 3), (1, 2), (2, 1)}
S = {(1, 1), (2, 2), (3, 3), (1, 3), (3, 1)} Then

R ⋃ S is an equivalence relation
R ⋃ S is reflexive and transitive but not symmetric
R ⋃ S is reflexive and symmetric but not transitive
R ⋃ S is symmetric and transitive but not reflexive

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