Which logic gate is represented by the following combination of logic gates?
A) OR
B) NOR
C) AND
D) NAND
Correct Answer:
C
Solution :
Output of gate-1, \[{{Y}_{1}}=\bar{A}\] Output of gate-2, \[{{Y}_{2}}=\bar{B}\] Output of gate-3, \[Y=\overline{{{Y}_{1}}+{{Y}_{2}}}=\overline{\bar{A}+\bar{B}}\] \[=\bar{\bar{A}}\,\bar{\bar{B}}\] \[=A\,B\] which is the output of AND gate.