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: Wakhan River (Persian: ab-e vakhan Tajik: Wakhandarya) also known in English as Ab-i-Wakhan is the name of the Sarhad branch of the Panj River along its upper length in Wakhan Afghanistan.The river arises in the Hindu Kush. It is formed by the confluence of the Wakhjir River and the Bozai Darya near Kashch Goz and Bozai Gumbaz some 40 km west of the Wakhjir Pass.
Question: The document can be classified to which topic?
Options: 1)Plant, 2)OfficeHolder, 3)NaturalPlace, 4)Artist, 5)Album
A:
3