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Question

Mark the correct alternative in the following question:

Let A = {1, 2, 3} and consider the relation R = {(1, 1), (2, 2), (3, 3), (1, 2), (2, 3), (1, 3)}. Then, R is

(a) reflexive but not symmetric (b) reflexive but not transitive
(c) symmetric and transitive (d) neither symmetric nor transitive

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Solution

We have,

R = {(1, 1), (2, 2), (3, 3), (1, 2), (2, 3), (1, 3)}

As, a,aR aASo, R is reflexive relationAlso, 1,2R but 2,1RSo, R is not symmetric relationAnd, 1,2R,2,3R and 1,3RSo, R is transitive relation

Hence, the correct alternative is option (a).

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