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Correct Answer: Option B — Milky Way. Milky Way is correct because it is the galaxy containing the Solar System. It is also associated with Sagittarius A* lies at its centre. Together, these two facts identify Milky Way precisely within Universe. Why the other options are incorrect: Option A — Andromeda Galaxy: Andromeda Galaxy is the nearest large galaxy to the Milky Way. It is also associated with it is visible from Earth without a telescope under dark skies, so these facts identify Andromeda Galaxy rather than Milky Way. Option C — Sun: Sun is the star at the centre of the Solar System. It is also associated with the photosphere is its visible surface, so these facts identify Sun rather than Milky Way. Option D — Sirius: Sirius is located in the constellation Canis Major. It is also associated with the brightest star in Earth's night sky, so these facts identify Sirius rather than Milky Way. Exam Takeaway: Link Milky Way with “the galaxy containing the Solar System” and “Sagittarius A* lies at its centre” for quick revision.
