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Let A = {x ∈ R : |x + 1| < 2 and B = {x ∈ R : |x – 1| ≥ 2}. Then which one of the following statements is NOT true ?

1. A – B = (–1, 1)
2. B – A = R – (–3, 1)
3. A ∩ B = (–3, –1)
4. A ∪ B = R – [1, 3)

Correct answer: B – A = R – (–3, 1)

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