The minimum number of elements that must be added to the relation R={(1,2)(2,3)} on the set of natural numbers so that it is an equivalence is:
A
4
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B
7
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C
6
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D
5
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Solution
The correct option is C6 Relation R contains R={(1,2)(2,3),(1,1),(2,2),(3,3),(2,1),(3,2),(1,3)} Total number of elements is 8 then the number of minimum elements added is 6.