Which of the following Islands is NOT located in the Caribbean Sea ?

Madeira is the odd one out. It is a Portuguese archipelago in the North Atlantic Ocean, roughly 600 km off the coast of Morocco, and it belongs to the Macaronesia group along with the Azores, the Canaries and Cape Verde. It is not part of the Caribbean at all.

The other three are Lesser Antilles islands that lie on the Caribbean Sea side of the arc:

• Grenada is an independent Commonwealth country in the Windward Islands, the southernmost of the group, near Trinidad and Venezuela.
• Montserrat is a British Overseas Territory in the Leeward Islands, known for the Soufriere Hills volcano that devastated Plymouth from 1995 onwards.
• Anguilla is also a British Overseas Territory in the northern Leeward Islands, a flat coral island east of Puerto Rico.

The core concept here is the geography of the Lesser Antilles, which forms the arc between the Atlantic and the Caribbean Sea. For Mains, these islands matter for GS-I (colonial legacy, small island states) and GS-II (CARICOM and Commonwealth relations with India). Madeira, by contrast, is a reminder that Portugal's Atlantic islands are a separate story.

Trap: Aspirants who treat any tropical island as Caribbean and skip the geography check often pick one of the Caribbean names. Learn the map of Atlantic island groups separately.