Which country has the shortest coastline in the world?

Which of the following countries is a landlocked country in the Balkans? Which African landlocked country has a coastline on Lake Tanganyika? Which landlocked country in South America is home to the Salar de Uyuni? Which European landlocked country is home to the High Tatras mountain range? Which country has the coastline along the Adriatic Sea? Which country has a coastline along the Persian Gulf? Which country has a coastline along the Baltic Sea? Which country has the coastline along the Black Sea?