Two metal spheres, one of radius R and the other of radius 2R, both have same surface charge density σ. If they are brought in contact and separated, then the new surface charge densities on each of the sphere are respectively
A) 5/2 σ, 5/4 σ
B) 3/5 σ, 6/5 σ
C) 5/3 σ, 5/6 σ
D) 2/3 σ, 1/2 σ