A planet moving along an elliptical orbit is closest to the sun at a distance r1 and farthest away at a distance of r2. If v1 and v2 are the linear velocities at these points respectively. then the ratio v1/v2
(a) (r1/r2)2
(b) r2/r2
(c) (r2/r1)2
(d) r1/r2
