Answer:
(c,
d) As observed from the Earth, Sun appears to move around the Earth in a
circular orbit though in reality Earth moves around the Sun due to
gravitational force between them. All planets move around the Sun due to huge
gravitational force of the Sun acting on them. The gravitational force on
Mercury due to Earth is much smaller as compared to that acting on it due to
Sun and hence it resolves around the Sun and not around the Earth.
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