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The equation of the tangent at the point...

The equation of the tangent at the point (0,3) on the circle which cuts the circles `x^2 +y^2-2x+6y=0`, `x^2 +y^2-4x-2y+6=0` and `x^2 +y^2-12x+2y+3=0` orthogonally is

A

`y=3`

B

`x=0`

C

`3x+y-3=0`

D

`x+3y-9=0`

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