Given the task definition and input, reply with output. 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.

Context: Micrantheum is a genus of plants under the family Picrodendraceae. It is found in Australia.The genus includes Allenia Ewart and Caletia Baill..Species include:Micrantheum demissum F.Muell. Micrantheum ericoides Desf.Micrantheum hexandrum Hook.f. - Box Micrantheum Micrantheum serpentinum Orchard - Western Tridentbush
Question: The document can be classified to which topic?
Options: 1)Building, 2)EducationalInstitution, 3)Plant, 4)MeanOfTransportation
3