Two conducting spheres of radii 3 cm and 1 m are separated by a distance of 10 cm in free space. If the spheres are charged to same potential of 10 V each, then the force of repulsion between them is
A. `((1)/(3))xx10^(-9)N`
B. `((2)/(9))xx10^(-9)N`
C. `((1)/(9))xx10^(-9)N`
D. `((4)/(9))xx10^(-9)N`