Three uniform spheres each of mass `m` and diameter `D` are kept in such a way that each touches the other two, then magnitudes of the gravitational force on any one sphere due to the other two is
A. `(sqrt(3))/(4)(GM^(2))/(R^(2))`
B. `(3)/(2)(GM^(2))/(R^(2))`
C. `(sqrt(3)GM^(2))/(R^(2))`
D. `(sqrt(3))/(2)(GM^(2))/(R^(2))`
