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Tangent and normal are drawn at P(16, 16) on the parabola y 2 = 16 x , which intersect the axis of the parabola at A and B, respectively. If C is the centre of the circle through the points P, A and B and ∠ CPB = θ , then a value of tan θ is:

1. 2 1
2. 2
3. 3
4. 3 4

Correct answer: 2

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