which of the following is a unit of distance

A unit of distance is any unit used to measure length, such as meter, kilometer, mile, or light‑year.

In many multiple‑choice questions, when they ask “which of the following is a unit of distance?”, common correct options include:

• Meter (m)
• Kilometer (km)
• Centimeter (cm)
• Mile (mi)
• Light‑year (ly), especially in astronomy questions.

If your specific question’s options include “light‑year” as one of the choices, that is often the intended correct answer in exam-style physics problems.