A. intersecting

B. non intersecting

C. touching

D. none

The equation of the tangent to the circle x^{2}+y^{2}-2x-4y+3=0 at (2, 3) is

The equation of the circle with centre (3, -2) and radius 3 is

The circles x^{2}+y^{2}-10x+16=0 and x^{2}+y^{2}=r^{2} intersect each other into distinct points if

The centre of the circle passing through the points (0, 0), (1, 0) and touching the circle x^{2}+y^{2}=9 is

Consider the circle x^{2}+y^{2}-4x-2y+c=0 whose centre is A(2, 1). If the point P(10, 7) is such that the line segment PA meets the circle in Q with PQ=5, then c=