Answer Happy

The input required for the output of X nand Y
to equal zero (false) is...
a. Not when (X = 0, Y = 1) or (X = 0, Y = 0) or
(X = 1, Y = 0).
b. X = 1, Y = 0.
c. X = 0, Y = 0.
d. When (X = 0, Y = 1) and (X = 0, Y = 0) and
(X = 1, Y = 0).
e. X = 0, Y = 1.