A 4-variable AND-OR-Invert circuit produces a 0 at its Y output. Which combination of inputs is correct?

A 4-variable AND-OR-Invert circuit produces a 0 at its Y output. Which

1.	A 4-variable AND-OR-Invert circuit produces a 0 at its Y output. Which combination of inputs is correct?
A.	[A].
B.	[B].
C.	[C].
D.	none of the above
Answer» D. none of the above