If a square matrix A is such that AAT = I = ATA, then |A| is equal to

1.	If a square matrix A is such that AAT = I = ATA, then \|A\| is equal to -
A.	0
B.	± 1
C.	± 2
D.	None of these
Answer» C. ± 2

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If a square matrix A is such that AAT = I = ATA, then |A| is equal to -

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