Two metal spheres each of radius 'r' and made of same material are separated by a certain fixed distance or (d gt 2r) in a medium. The gravitational force between those spheres is proportional to

Two metal spheres each of radius 'r' and made of same material are sep

1.	Two metal spheres each of radius 'r' and made of same material are separated by a certain fixed distance or (d gt 2r) in a medium. The gravitational force between those spheres is proportional to
Answer» `(1)/(R^(2))` `(1)/(r^(4))` `r^(4)` `r^(6)` ANSWER :D