a
The truth table of the given waveform is as shown in the table.

\(\begin{array}{|c|c|c|c|c|}\hline \text { Time interval } & {\text { Input } A} & {\text { Input } B} & {\text { Output } C} & {\;} \\ \hline 0 \text { to } t_{1} & {0} & {0} & {0} & {\;} \\ \hline t_{1} & {\text { to } t_{2}} & {1} & {0} & {1} \\ \hline t_{10} & {t_{2}} & {1} & {1} & {1} \\ \hline t_{3} & {t o t_{4}} & {0} & {1} & {1} \\ \hline t_{40} & {t_{5}} & {0} & {0} & {0} \\ \hline t_{s} & {\text { to } t_{6}} & {1} & {0} & {1} \\ \hline>t_{6} & {0} & {1} & {1} & {\;} \\ \hline\end{array}\)

The logic circuit is \(OR\) gate.