A. x-2y=5

B. y-2x=5

C. 2y-x=5

D. none

If y=4x-5 is a tangent to the curve y^{2}=px^{3}+q at (2, 3), then

For the circles x^{2}+y^{2}+4x+2y-4=0, x^{2}+y^{2}-4x-2y+4=0 the line 3x+4y-5=0 is a

The locus of midpoints of the chord of the circle x^{2}+y^{2} = 25 which pass through a fixed point (4, 6) is a circle. The radius of that circle is

If one end of the diameter of the circle x^{2}+y^{2}-6x+4y-12=0 is (7, -5), then the other end of the diameter is

Polar of the origin w.r.t the circle x^{2}+y^{2}+2ax+2by+c=0 touches the circle x^{2}+y^{2}=r^{2} if