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Two sets A and B are as under: A = {(a, b) ∈ R × R : |a – 5| < 1 and |b – 5| < 1} ; B = {(a, b) ∈ R × R : 4(a – 6) 2 + 9(b – 5) 2 ≤ 36}. Then

1. B ⊂ Α
2. A ⊂ B
3. A ∩ B = φ (an empty set)
4. neither A ⊂ B nor B ⊂ A

Correct answer: A ⊂ B

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