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What is the output X of the following logic gate circuit?

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What is the output X of the following logic gate circuit?
image
A. `bar(A.B)`
B. `barA.barB`
C. `barbar(A.B)`
D. A+ B
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Correct Answer - B
For the two NOT gates, inputs are A and B and the outputs are `barA` and `barB`. `barA` and `barB` are the inputs of the AND gate.
`therefore` Output X=`barA.barB`
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