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(D) The circuit consists of an $AND$ gate and a $NAND$ gate whose outputs are fed into an $OR$ gate. Let the inputs be $A, B, C$. The output of the $A

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(D) The circuit consists of an $AND$ gate and a $NAND$ gate whose outputs are fed into an $OR$ gate. Let the inputs be $A, B, C$. The output of the $AND$ gate is $A \cdot B$. The output of the $NAND$ gate is $\overline{B \cdot C}$. The final output $Y$ of the $OR$ gate is $Y = (A \cdot B) + \overline{(B \cdot C)}$.Analyzing the truth table for the intervals:- Interval $0-t_1$: $A=0, B=0, C=1$. $Y = (0 \cdot 0) + \overline{(0 \cdot 1)} = 0 + 1 = 1$.- Interval $t_1-t_2$: $A=1, B=0, C=1$. $Y = (1 \cdot 0) + \overline{(0 \cdot 1)} = 0 + 1 = 1$.- Interval $t_2-t_3$: $A=0, B=1, C=0$. $Y = (0 \cdot 1) + \overline{(1 \cdot 0)} = 0 + 1 = 1$.- Interval $t_3-t_4$: $A=1, B=1, C=0$. $Y = (1 \cdot 1) + \overline{(1 \cdot 0)} = 1 + 1 = 1$.- Interval $t_4-t_5$: $A=0, B=0, C=1$. $Y = (0 \cdot 0) + \overline{(0 \cdot 1)} = 0 + 1 = 1$.- Interval $t_5-t_6$: $A=1, B=0, C=1$. $Y = (1 \cdot 0) + \overline{(0 \cdot 1)} = 0 + 1 = 1$.Since the output is $1$ $(5 	ext{ V})$ for all intervals,the correct representation is a constant $5 	ext{ V}$ signal.

For the given circuit,the input digital signals are applied at the terminals $A, B$ and $C$. What would be the output at the terminal $y$?

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