Two planets P1 and P2 are moving around the Sun, in circular orbits of radii $$10^{13}\,m$$ and $$10^{12}\,m$$ respectively. The ratio of the orbital speeds of planets P1 and P2 in their respective orbits is

A

$$\sqrt{10}$$

B

$$10$$

C

$$10\sqrt{10}$$

D

$$\frac{1}{\sqrt{10}}$$