Which country is the only neighbor of Vatican City?

Which island is separated from the Asian mainland by the Strait of Malacca? Which island is part of the Svalbard archipelago? Which island is the largest in the Hebrides? What is the world's largest island with no permanent residents? Which countries share a border with Slovenia? Which country shares a border with only the United Kingdom? Which countries share a border with Latvia? Which country shares borders with both Canada and Mexico?