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Let A and B be two sets such that Axx B=...

Let A and B be two sets such that `Axx B={(a,1),(b,3),(a,3),(b,1),(a,2),(b,2)` then

A

1) `A = {1,2,3} and B={a,b}`

B

2) `A= {a,b} and B = {1,2,3}`

C

3) `A ={1,2,3} and B sub {a,b}`

D

4) `A sub {a,b} and B sub {1,2,3}`

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The correct Answer is:
B
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