Gravitational force between two bodies does not depend on _______.
sum of their masses
Definition of Gravitational force
The gravitational attraction between any two bodies is proportional to the product of their masses and inversely proportional to the square of the distance between them.
Here is the gravitational force; is the Universal Gravitational Constant, , are the masses of the two bodies, is the distance between their centers, is the radial unit vector, the negative sign is due to the attractive nature of the force.
Dependency of the force of gravitation
The force of gravitation as seen from the above formula depends upon the product of the masses, the gravitational constant, and the separation between the masses.
Therefore, the correct option is (a). The Gravitational force does not depend upon the sum of the masses.