As observed from the earth, the sun appears to move an approx. circular orbit. For the motion of another planet like mercury as observed from the earth, this would

Options

A. be similarly true.
B. not be true because the force between earth and mecury is not inverse square law.
C. not be true because the major gravitational force on mercury is due to sun.
D. not be true because mercury is influenced by force other than gravitational force.

Answer

C

Explanation

The sun appears to move in an approximate circular orbit as observed from the earth. The gravitational force of attraction between earth and sun always followed inverse square law.
Due to relative motion between earth and mercury, the orbit of mercury as observed from the earth will not be appoximately circular, since the major gravitational force on mercury is due to sun.