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A Boolean function $x’y’ + xy + x’y$ is equivalent to

1. $x' + y'$
2. $x + y$
3. $x + y'$
4. $x' + y$

x'y' + x'y = x'(y+y') = x'
x' + xy = x' + y

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0
how x' + xy = x' + y ????

use K map
0
Use distribution rule  ...
= X'Y' + XY +X'Y

= X' ( Y + Y' ) + Y ( X + X')

= X' + Y

hence option d is correct