\[A,B\] are n-rowed square matrices such that \[AB=O\]and B is non-sin

1.	\[A,B\] are n-rowed square matrices such that \[AB=O\]and B is non-singular. Then
A.	\[A\ne O\]
B.	\[A=O\]
C.	\[A=I\]
D.	None of these
Answer» C. \[A=I\]

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\[A,B\] are n-rowed square matrices such that \[AB=O\]and B is non-singular. Then

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