Two masses exerting a force on each other is an example

a.) kepler's law
b.)heliocentric theory
c.)universal law of gravitation
d.)geocentric

The correct answer is option C, that is, the universal law of gravitation.  

According to Newton's law of universal gravitation, every particle fascinates every other particle in the universe with a force that is directly equivalent to the product of their masses and inversely proportional to the square of the distance between their centers. This is a usual physical law obtained from empirical observations by what Isaac Newton knew as inductive reasoning.