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0. Which of the following is/are TRUE with respect to crisp sets A, B ⊆ X, where X is the universal set? 1. (Ac ∪ B) ∪ (A ∪ Bc) = X 2. (Ac ∩ B) ∩ (A ∩ Bc) = X 3. A ∩ (Ac ∪ B) = A ∪ B 4. A ∪ (Ac ∪ B)c = A
1 and 2
3 only
2 and 3
1 and 4
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