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If A and B are square matrices such that...

If A and B are square matrices such that `A^(2)= A ,B^(2) =B `and A,B commute, then

A

`(AB)^(2)=I`

B

`(AB)^(2) = AB `

C

`(AB)^(2) =O`

D

None of these

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The correct Answer is:
B
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