 
			 
			MCQOPTIONS
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				| 1. | If for a square matrix A, A2 = A then such a matrix is known as _________ | 
| A. | Idempotent matrix | 
| B. | Orthagonal matrix | 
| C. | Null matrix | 
| D. | None of the mentioned | 
| Answer» B. Orthagonal matrix | |