Question
The output of a $NAND$ gate is $0$
✓
Answer
(c)If inputs are $A$ and $B$ then output for $NAND$ gate is $Y = \overline {AB} $
==> If $A = B = 1$, $Y = \overline {1.1} = \bar 1 = 0$
==> If $A = B = 1$, $Y = \overline {1.1} = \bar 1 = 0$
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