4 light-years 400 light-years 4 billion kilometers 400 billion kilometers
I gave my students this multiple choice question: Which measurement is the most accurate way to describe the distance between the Sun and its nearest neighboring star?

Only one answer is correct among these 4 choices:
- 4 light-years
- 400 light-years
- 4 billion kilometers
- 400 billion kilometers

Could you tell me which one is correct?

4 light-years