What is the name of the Spanish exclave town completely surrounded by France, reachable from Spain only via its international railway station?

• A Andorra
• B Puigcerda
• C La Seu d'Urgell
• D Llivia ✓

Llivia remained Spanish after the 1659 Treaty of the Pyrenees because it was classified as a town rather than a village, creating an enclave entirely inside French territory.