The logic circuit shown below has the input waveforms ‘A’ and ‘B’ as shown. Pick out the current output waveform.

From the given circuit,

$\mathrm{Y}=\overline{\overline{\mathrm{A}}+\overline{\mathrm{B}}}=\overline{\overline{\mathrm{A}}}·\overline{\overline{\mathrm{B}}}=\mathrm{A}·\mathrm{B}$

The given circuit works as AND gate for the input waveform.

so, the output waveform will be as below: