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Let A, B and C be sets such that φ ≠ A ∩ B ⊆ C. Then which of the following statements is not true ?

1. If (A – B) ⊆ C, then A ⊆ C
2. B ∩ C ≠ φ
3. (C ∪ A) ∩ (C ∪ B) = C
4. If (A – C) ⊆ B, then A ⊆ B

Correct answer: If (A – C) ⊆ B, then A ⊆ B

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