Question

The logic expression which is NOT true in Boolean algebra is

• A. $[\overline{1}+\overline{1}].1=0$
• B. $[\overline{1}+0].1=0$
• C. $[\overline{1}+0].\overline{1}=0$
• D. $[1+1].1=0$

Answer 1

The correct option is D $[1+1].1=0$

$[\overline{1}+\overline{1}].1=[0+0].1=0$
$[\overline{1}+0].1=[0+0].1=0$
$[\overline{1}+0].\overline{1}=[0+0].0=0$
$\left[1.1\right].1=1.1=1\ne 0$