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If the angle between the tangents drawn ...

If the angle between the tangents drawn to ` x^(2) + y^(2) + 2g x + 2fy + c = 0 ` from (0,0) is ` pi//2` , then

A

`g^(2) + f^(2) = 3c`

B

`g^(2) + f^(2) = 2c`

C

`g^(2) +f^(2) = 5c`

D

`g^(2) + f^(2) = 4c`

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The correct Answer is:
B
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