Question

# The combination of ‘NAND’ gates shown here under (figure) are equivalent to An OR gate and an AND gate respectivelyAn AND gate and a NOT gate respectivelyAn AND gate and an OR gate respectivelyAn OR gate and a NOT gate respectively

Solution

## The correct option is A An OR gate and an AND gate respectivelyFor 1st combination C=¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯A.A ¯¯¯¯¯¯¯¯¯¯¯B.B A.A. = A & B.B. = B C=¯¯¯¯¯¯¯¯¯¯¯¯¯¯A.¯¯¯¯B C=¯¯¯¯¯¯¯¯A¯¯¯¯¯¯¯¯B C = A + B It is an OR gate For 2nd combination C=¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯A.B.¯¯¯¯¯¯¯¯¯¯¯A.B C=¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯A.B.¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯A.B C = AB + AB C = AB Its an AND gate

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