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The chord of contact of tangents drawn f...

The chord of contact of tangents drawn from any point on the circle `x^2+y^2=a^2` to the circle `x^2 + y^2 = b^2` touches the circle `x^2 + y^2 =c^2`. Then a, b, c are in:

A

A.P

B

`G . P`

C

H.P

D

none of these

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The correct Answer is:
B
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