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Which of the following statement is true? (A) A ∩ B = Φ ⇒ A = Φ and B = Φ (B) A – B = Φ ⇒ A ⊂ B (C) A ∪ B = Φ ⇒ A ⊂ B (D) None of these |
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Answer» Answer is (A) A ∩ B = Φ ⇒ A = Φ and B = Φ Because in A ∩ B = Φ, Φ is common in A and B. |
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