Explanation:

First option is correct. Ross Island is an island of the Andaman Islands. It belongs to the South Andaman administrative district, Andaman and Nicobar Islands. the island is situated 3 km east from downtown Port Blair.
Second option is incorrect. Diego Garcia is an atoll just south of the equator in the central Indian Ocean, and the largest of 60 small islands comprising the Chagos Archipelago.
Third option is incorrect. Reunion Island, a French department in the Indian Ocean, is known for its volcanic, rain-forested interior, coral reefs and beaches.
Fourth option is incorrect. The Spratly Islands are a disputed group of islands, islets and cays and more than 100 reefs, sometimes grouped in submerged old atolls, in the South China Sea. The archipelago lies off the coasts of the Philippines, Malaysia, and southern Vietnam.