only the Sun the Sun and the Moon the Sun, the Moon, and some planets the Sun, the Moon, some planets, and comets
I gave my students this multiple choice question: Which objects in our solar system give off their own light?

Only one answer is correct among these 4 choices:
- only the Sun
- the Sun and the Moon
- the Sun, the Moon, and some planets
- the Sun, the Moon, some planets, and comets

Could you tell me which one is correct?

only the Sun