A. (1, 0)

B. (2, -3)

C. (5, 2)

D. (-1, 0)

The equation of the tangents to a circle x^{2}+y^{2}-4x-6y-12=0 and parallel to 4x-3y=1 are

Equation x^{2}+2ax-b^{2}=0 has real roots α, β and equation x^{2}+2px-q^{2}=0 has real roots γ, δ. If circle C is drawn with the points (α, γ), (β, δ) as extremities of a diameter, then the equation of C is

The equation of the circle passing through (0, 0) and cutting orthogonally the circles x^{2}+y^{2}+6x-15=0, x^{2}+y^{2}-8x+10=0 is

The equation of the circle passing through the points of intersection of the circle x^{2}+y^{2}-2x+4y-20=0, the line 4x-3y-10=0 and the point (3, 1) is

The equation of the circle touching the line 3x-4y-15=0 and belonging to the coaxal system having limiting points (2, 0), (-2, 0) is