Last Updated:
Correct Answer: Option A — Mercury. Mercury is correct because it is a terrestrial planet. Mercury is also associated with the closest planet to the Sun. A further identifying fact is that Mercury is the shortest orbital period among the planets. Another useful fact is that Mercury is associated with it has no natural satellite. Why the other options are incorrect: Option B — Venus: It is a terrestrial planet and is associated with the second planet from the Sun; those are the identifying facts of Venus. Option C — Earth: It is a terrestrial planet and is associated with the third planet from the Sun; those are the identifying facts of Earth. Option D — Mars: It is a terrestrial planet and is associated with the fourth planet from the Sun; those are the identifying facts of Mars. Exam Takeaway: Link Mercury with “a terrestrial planet” and “the closest planet to the Sun” for quick revision.
