Question

Identify the correct output signal $Y$ in the given combination of gates (as shown) for the given inputs $A$ and $B$.

• A.
• B.
• C.
• D.

Answer 1

The correct option is D

Using Boolean expression, we have
$y=\overline{\overline{A}.\overline{B}}=\overline{\overline{A}}+\overline{\overline{B}}=A+B$


Truth table:



Hence, $\left(A\right)$ is the correct answer.