Keyboards are organised in a matrix. The CPU of 8051 accesses both rows and columns through its ports. So, it can accessA) 4 × 4 matrix of keysB) 8 × 8 matrix of keysC) 16 × 16 matrix of keysD) 2 × 2 matrix of keysE) 32 × 32 matrix of keysChoose the most appropriate answer from the options given below:

Keyboards are organised in a matrix. The CPU of 8051 accesses both row

1.	Keyboards are organised in a matrix. The CPU of 8051 accesses both rows and columns through its ports. So, it can accessA) 4 × 4 matrix of keysB) 8 × 8 matrix of keysC) 16 × 16 matrix of keysD) 2 × 2 matrix of keysE) 32 × 32 matrix of keysChoose the most appropriate answer from the options given below:
A.	(B) only
B.	(A) only
C.	(C) only
D.	(D) and (E) only
Answer» B. (A) only

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