railway RRB Technician Grade 1 Mock Test 2024 Mathematics Sets Operations on Sets

Which of the following represents De Morgan's Law?

1
A ∩ B = A' ∪ B' 
2
(A ∪ B)' = A' ∩ B'
3
(A’ ∪ B') = A ∩ B'
4
(A ∪ B') = A' ∩ B
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