question_answer

The combination of gates as shown in the figure forms the

A)  AND gate         

B)  OR gale

C)  NOR gate         

D)  NOT gate

Correct Answer: A

Solution :

We can write                             \[Y=\overline{\overline{A}+\overline{B}}=\bar{\bar{A}}\,.\,\bar{\bar{B}}=A\,.B\] Thus, given combination is equivalent to AND gate.