Sarthaks Test
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IfA = {1, 3, 5, 7, 9, 11, 13, 15, 17} B = {2, 4, ... , 18} and N the set of natural numbers is the universal set, then A′ ∪ (A ∪ B) ∩ B′) is 

(A) φ 

(B) N 

(C) A 

(D) B

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Answer is (B) N 

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