The correct answer is option 1: None of them are landlocked from all four sides.

Option 1 states that none of the Nordic countries are completely surrounded by land from all four sides. This means that they all have a coastline or access to the sea. The Nordic countries include Norway, Sweden, Denmark, Finland, and Iceland. Norway and Sweden have coastlines along the North Atlantic Ocean, while Denmark is located on the Jutland Peninsula and has access to the Baltic Sea. Finland has a coastline along the Baltic Sea, and Iceland is an island located in the North Atlantic Ocean.

Option 2, stating that the Arctic Circle passes through all the Nordic countries, is incorrect. While it is true that the Arctic Circle does cross through parts of Norway, Sweden, and Finland, it does not pass through Denmark or Iceland.

Option 3, claiming that inland waterway is the most important means of internal transport in the Nordic countries, is not mentioned and cannot be confirmed as true or false based on the given information.

Option 4 suggests that the whole region is ice-capped throughout the year, which is also incorrect. While parts of the Nordic countries do experience cold climates and have glaciers, the entire region is not covered in ice year-round.

Therefore, the