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Semi-transverse axis of hyperbola is '5'...

Semi-transverse axis of hyperbola is '5'. The tangent and normal to it at point P meets conjugate axis A and B. The circle on AB as diameter passes through two fixed points, the distance between which is 20. The eccentricity of hyperbola is

A

2

B

`3//2`

C

`5//4`

D

3

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The correct Answer is:
A
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