Two metal spheres each of radius `r` are kept in contact with each other. If `d` is the density of the material of the sphere,then the gravitational force between those spheres is proportional to

Options

A. `d^(2)r^(6)`
B. `d^(2)r^(4)`
C. `(d^(2))/(r^(4))`
D. `(r^(2))/(d^(2))`

Answer

B

Explanation

`F=(Gm_(1)m_(2))/(R^(2))` here m=(Vol)(den)