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(A) In the given circuit,the inputs $A$ and $B$ are passed through $NOT$ gates before being fed into an $OR$ gate.Let $A$ and $B$ be the input signals

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(A) In the given circuit,the inputs $A$ and $B$ are passed through $NOT$ gates before being fed into an $OR$ gate.Let $A$ and $B$ be the input signals where $1$ represents high and $0$ represents low.From the waveform,the sequence for $A$ is $1, 0, 1, 0$ and for $B$ is $1, 1, 0, 0$.After passing through the $NOT$ gates,the inputs to the $OR$ gate become $A' = 0, 1, 0, 1$ and $B' = 0, 0, 1, 1$.The $OR$ gate performs the operation $Y = A' + B'$.Calculating the output sequence:For the first interval: $0 + 0 = 0$For the second interval: $1 + 0 = 1$For the third interval: $0 + 1 = 1$For the fourth interval: $1 + 1 = 1$Thus,the resultant sequence for $Y$ is $0, 1, 1, 1$. This corresponds to option $A$.

In the given circuit as shown,two input waveforms $A$ and $B$ are applied simultaneously. The resultant waveform $Y$ is:

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