A pair of tangents are drawn from the or...

A pair of tangents are drawn from the origin to the circle `x^2 + y^2 + 20 (x + y) + 20 = 0`, The equation of pair of tangent is

A

`x^(2) + y^(2)+ 10xy= 0`

B

`x^(2) +y^(2) + 5xy=0`

C

`2x^(2) + 2y^(2) + 5xy= 0`

D

`2x^(2) + 2y^(2) - 5xy= 0`

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The correct Answer is:

C

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