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.

[EX Q]: Context: The Mooi River (Afrikaans: Mooirivier) is a river in North West Province South Africa. It is a tributary of the Vaal River and belongs to the Upper Vaal Water Management Area.
Question: The document can be classified to which topic? 
Options: 1)Athlete, 2)Artist, 3)OfficeHolder, 4)MeanOfTransportation, 5)NaturalPlace
[EX A]: 5

[EX Q]: Context: Rosa wichuraiana (syn. 'Memorial rose' R. lucillae) is a species of rose. It is a woody semi-evergreen shrub with long trailing thorny branches of glossy green leaves and single five-petalled white flowers with prominent yellow stamens in Summer; followed by small dark red hips. It can grow to 6 metres (20 ft). It is named after the German botanist Max Ernst Wichura (1817–1866) with the suffix -iana.While it is valued as a garden plant in its own right R.
Question: The document can be classified to which topic? 
Options: 1)MeanOfTransportation, 2)Plant, 3)OfficeHolder, 4)Artist, 5)Company
[EX A]: 2

[EX Q]: Context: Silver City Airways was a private British independent airline formed in 1946. The name Silver City was derived from the eponymous Australian mining town at Broken Hill where The Zinc Corporation was headquartered. Silver City's first commercial flight departed London Heathrow for Sydney via Johannesburg in late 1946.
Question: The document can be classified to which topic? 
Options: 1)NaturalPlace, 2)Album, 3)Company, 4)Film
[EX A]:
3