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: Echinodorus trialatus is a type of plant. In Rataj's taxonomy E. trialatus is in Section Paniculati Subgenus Echinodorus.
Question: The document can be classified to which topic?
Options: 1)Film, 2)WrittenWork, 3)Plant, 4)MeanOfTransportation, 5)NaturalPlace
3