In this task, you are given a text which is the body of a document. You are given a question and options. Pick the correct number. Don't generate anything else apart from the numbers provided in options.
Q: Context: The Radika (Macedonian and Serbian: About this sound Radika; Albanian: Radikes) is a river in southern Kosovo and western Macedonia a 70 km (43 mi)-long right tributary to the Black Drin river.The Radika proper is 52 km (32 mi) long but measured from the most distant source in its watershed that of the Crni Kamen river it is 70 km (43 mi) long.
Question: The document can be classified to which topic?
Options: 1)MeanOfTransportation, 2)NaturalPlace, 3)Company, 4)Animal, 5)WrittenWork
A:
2