The correct answer is Liechtenstein. Switzerland shares land borders with five countries: Germany to the north, France to the west, Italy to the south, Austria to the east, and the tiny Principality of Liechtenstein, also to the east, sandwiched between Switzerland and Austria along the Rhine valley. Liechtenstein is one of the smallest sovereign states in the world and maintains an unusually close relationship with Switzerland, using the Swiss Franc as its own official currency and relying on Switzerland for aspects of its defence and diplomatic representation abroad. The distractor 'Monaco' is incorrect because Monaco is a microstate located on the Mediterranean coast, entirely surrounded by French territory, with no geographic connection to Switzerland whatsoever. 'San Marino' is wrong because it is a landlocked microstate completely enclosed within Italian territory, far from Switzerland's borders. 'Andorra' is incorrect because it lies between France and Spain in the Pyrenees mountains, nowhere near Switzerland's actual frontier. A common exam confusion arises because candidates often group all small, wealthy European microstates together without recalling their precise locations; Monaco, San Marino, and Andorra are frequently confused with one another and with Liechtenstein, even though only Liechtenstein actually touches Swiss territory. The revision takeaway: Switzerland's five neighbours are Germany, France, Italy, Austria, and Liechtenstein — remembering that Liechtenstein sits specifically between Switzerland and Austria, and uses the Swiss Franc, helps permanently fix this fact and avoid confusing it with Europe's other tiny states.