If $A, B$ are square matrices of order $3 . A$ is non singular and $A B=O$, then $B$ is a

If $A, B$ are square matrices of order $3 . A$ is non singular and $A B=O$, then $B$ is a
  1. null matrix
  2. non singular matrix
  3. singular matrix
  4. unit matrix

Solution

Given, $A$ is non-singular and $A B=O$ So, $b$ is a null matrix.

Asked in: AP EAMCET 2002

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