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1 votes
1 votes

1 Answer

2 votes
2 votes

finding dual means  shifting  from positive logic to negative logic and vice versa . hence 0 will change to 1 , 1 to 0 , and to or .

consider the table for a<=b and a^b=a

e.g

a b a^b
0 0 0
0 1 0
1 0 not valid because a>b
1 1 1

now consider the dual of above table

a b a or b =a
1 1 1
1 0 1
0 1 not valid
0 0 0

we can clearly see that if a or b =a then a>= b

therefore option d is correct

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