Explanation
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Mercury is the planet that is closest to the Sun.
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Then comes Venus, which is the second closest planet to the Sun, then Earth, which is the third closest planet to the Sun.
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Mercury's distance from the Sun ranges from 46 million km to 69.8 million km.
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The planet was most likely given its name because it travels so fast across space.
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Mercury's temperature changes are the most dramatic in the solar system, ranging from 90 K to 700 K.
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After Earth, Mercury is the densest significant planet in the solar system.
Final Answer
The correct option is C i.e Mercury.
