Mercury, Venus, Earth, Mars Mars, Mercury, Earth, Venus Earth, Venus, Mercury, Mars Venus, Earth, Mars, Mercury
I gave my students this multiple choice question: Which is the order of the planets from closest to the Sun to farthest from the Sun?

Only one answer is correct among these 4 choices:
- Mercury, Venus, Earth, Mars
- Mars, Mercury, Earth, Venus
- Earth, Venus, Mercury, Mars
- Venus, Earth, Mars, Mercury

Could you tell me which one is correct?

Mercury, Venus, Earth, Mars