UGC NET CS 2018 July - II Question 88

88. Which of the relations on {0, 1, 2, 3} is an equivalence relation ?

(1) { (0, 0) (0, 2) (2, 0) (2, 2) (2, 3) (3, 2) (3, 3) }
(2) { (0, 0) (1, 1) (2, 2) (3, 3) }
(3) { (0, 0) (0, 1) (0, 2) (1, 0) (1, 1) (1, 2) (2, 0) }
(4) { (0, 0) (0, 2) (2, 3) (1, 1) (2, 2) }

Answer: 2

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