Which of the following is not a valid Boolean algebra rule? – McqOptions

MCQOPTIONS

1.	Which of the following is not a valid Boolean algebra rule?
A.	X.X = X
B.	(X + Y) . X = X
C.	X̅ + XY = Y
D.	(X + Y).(X + Z) = X + YZ
Answer» D. (X + Y).(X + Z) = X + YZ

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