Equation of a circle that cuts the circl...

Equation of a circle that cuts the circle `x^2 + y^2 + 2gx + 2fy + c = 0`, lines `x=g and y=f` orthogonally is : (A) `x^2 + y^2 - 2gx - 2fy - c = 0` (B) `x^2 + y^2 - 2gx - 2fy - 2g^2 - 2f^2 - c =0` (C) `x^2 + y^2 + 2gx + 2fy + g^ + f^2 - c = 0` (D) none of these

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