Let A and B two sets such that n( AxB)= 6 . If three elements of AXB are ( 3,2)(7,5)(8,5), then

The correct answer is: A= {3,7,8}

We have given the two sets A and B
And n( A x B)= 6
Therefore, the one set should contain 3 and one should contain 2 elements
Since, {(3,2),(7,5),(8,5)} are the elements of A×B.
It follows that the elements of
set A={3,7,8}
and B={2,5}
Hence,
A × B = {(3,2),(3,5),(7,2),(7,5),(8,2),(8,5)}
Therefore the correct option is a) A= {3,7,8}