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If A={x:x^2-3x+2=0} ,and R is a universa...

If `A={x:x^2-3x+2=0}` ,and R is a universal relation on A, then R is

A

{(1,1),(2,2)}

B

{(1,1)}

C

`{(2,1)}`

D

{(1,1),(1,2),(2,1),(2,2)}

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The correct Answer is:
D
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