If the gravitational force of attraction between any two bodies depends on 1/R2 and is directly proportional to the mass of the bodies.

Q. If the gravitational force of attraction between any two bodies depends on 1/R² and is directly proportional to the mass of the bodies. Then the period of the planet round the Sun, in a circular orbit will be proportional to
(A) R²
(B) R^–2
(C) R^3/2
(D) R

The answer is: (C) R^3/2