The equation of circle which touches the...

The equation of circle which touches the line ` y=x` at origin and passes through the point (2,1) is `x^2 + y^2 + px + qy = 0` Then ` p, q ` are

A

`5, -5`

B

`-4, 4`

C

`4, -4`

D

`-5, 5`

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The correct Answer is:

D

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