Question

Which of the following boolean expression is related to De-Morgan theorem ?

• A. $x + xy = x$
• B. $x + (y + z) = (x + y) + z$
• C. $x(y + z) = xy + xz$
• D. $(x + y)' = x'y'$

Hint:

To remember De-Morgan's theorem, use the phrase: "Break the bar, change the sign." When you break the overline (complement), the $+$ becomes $\cdot$ (and vice versa).

Answer 1

The Correct Option is D