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Let R be the relation in the set N given...

Let R be the relation in the set N given by `R = {(a, b) : a - b = 5, a > 7}`, choose correct answer :

A

`(7, 2) in R`

B

`(15, 12) in R`

C

`(9, 4) in R`

D

`(8, 2) in R`

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