# Digital-GrandTest1-Q10

Consider the circuit shown in the figure. The correct input/output relationship between Y and $(X_1, X_2)$ is

$(A). Y = X_1 + X_2$

$(B). Y = X_1.X_2$

$(C). Y = X_1 \oplus X_2$

$(D).Y = \overline{ (X_1 \oplus X_2)}$

reshown Jun 20

Here 4 NOR gate combination make XNOR gate.

XNOR is complement of XOR
i.e Y= (X1⊕X2)'
So D is correct one.

answered Jun 20 by (30,120 points)
selected Jun 21 by gbmentor
Ans Edited.
Also Tip : Read XNOR by 4 NOR or 5 NAND
AND XOR  by 4 NAND or 5 NOR