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If `R` is a relation on the set `A={1,2,3,4,5,6,7,8,9}` given by `x R y \ y=3x` then `R=`

A

{(3,1),(6,2),(9,3)}

B

{(1,3),(3,9)}

C

{(1,3),(2,6),(3,9)}

D

None of these

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The correct Answer is:
C
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