Solve this following

Question:

Draw the output signal $Y$ in the given combination of gates :-

 


Correct Option: , 4

Solution:

According to gates by Demorgan's law

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

By observation.

 

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