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Let A={:((1,2),(3,4):}) and B={:((a,0),(...

Let `A={:((1,2),(3,4):})` and `B={:((a,0),(0,b)):}`, where `a,b in N`, then

A

there exist infinitely many B' s such that AB=BA

B

there cannot exist B such that AB=BA

C

there exist more than one but finite number of B's such that AB= BA

D

there exists exactly one B such that AB=BA

Text Solution

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The correct Answer is:
A
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