Solve this following
Question:

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

Correct Option: , 3

Solution:

$\mathrm{y}=\overline{\overline{\mathrm{A}} \cdot \overline{\mathrm{B}}}=\overline{\overline{\mathrm{A}}}+\overline{\overline{\mathrm{B}}}=\mathrm{A}+\mathrm{B}$