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Question

Let R be a reflexive relation on a set A and I be the identity relation on A. Then

A
RI
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B
IR
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C
RI
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D
IR
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Solution

The correct option is B IR
We know that an Identity relation is always subset of reflexive relation i.e.,IR
Consider an example,
A={1,2,3}
I={(1,1),(2,2),(3,3)}
R={(1,1),(2,2),(3,3),(1,2),(2,3)}
I is always a subset of R

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