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If A B=A and B A=B, then B^2=...

If `A B=A` and `B A=B`, then `B^2=`

A

`B^2=B` and `A^2=A`

B

`B^2 ne B` and `A^2=A`

C

`A^2 ne A` and `B^2=B`

D

`A^2 ne A` and `B^2 ne B`

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The correct Answer is:
A
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HIMALAYA PUBLICATION-MATRICES AND DETERMINANTS-QUESTION BANK
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