Which Universe term is correctly associated with important feature: “the distance light travels in one year”, and also with “approximately 9.46 trillion kilometres”?

Correct Answer: Option C — Light-year. Light-year is correct because it is the distance light travels in one year. It is also associated with approximately 9.46 trillion kilometres. Together, these two facts identify Light-year precisely within Universe. Why the other options are incorrect: Option A — Milky Way: Milky Way is Sagittarius A* lies at its centre. It is also associated with it belongs to the Local Group, so these facts identify Milky Way rather than Light-year. Option B — Andromeda Galaxy: Andromeda Galaxy is it is visible from Earth without a telescope under dark skies. It is also associated with it belongs to the Local Group, so these facts identify Andromeda Galaxy rather than Light-year. Option D — Sun: Sun is the photosphere is its visible surface. It is also associated with sunlight reaches Earth in about 8 minutes 20 seconds, so these facts identify Sun rather than Light-year. Exam Takeaway: Link Light-year with “the distance light travels in one year” and “approximately 9.46 trillion kilometres” for quick revision.