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If a circle C passing through (4,0) touc...

If a circle C passing through `(4,0)` touches the circle ` x^(2) + y^(2) + 4x - 6 y = 12 ` externally at a points `(1,-1)` then the radius of circle C is equal to

A

` sqrt(57)`

B

4

C

`2sqrt(5)`

D

5

Text Solution

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The correct Answer is:
D
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