Assertion (A): Comets move around the sun in elliptical orbits. The work done by the gravitational
force of the sun on a comet over a complete orbit is zero.
Reason (R): The gravitational force is conservative
LAT
a) Both A and R are true and R is the correct explanation of A
b) Both A and R true and R is not the correct explanation of A
c) A is true but Ris false
d) A is false but R is true
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