Among the following, a null set is (where N is the set of natural numb – InterviewSolution

1.	Among the following, a null set is (where N is the set of natural numbers) A) {x : x < 5 and x ∈ N) B) {x : x2 = 4, x ∈ N} C) {x : x2 + 1 = 0 x ∈ N} D) {x : x is even prime}
Answer» Correct option is (C) {x : x² + 1 = 0 x ∈ N}

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