The tangent to the circle x^2+y^2=5 at (...

The tangent to the circle `x^2+y^2=5` at `(1,-2)` also touches the circle `x^2+y^2-8x+6y+20=0` . Find the coordinats of the corresponding point of contact.

A

( 3,1)

B

(-1,3)

C

( 3,-1)

D

( 1,-3)

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The correct Answer is:

C

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