Task: Text Categorization
Input (English): Question: Amantadine is a drug that can be used as: 
 Options:  <0> Antiviral and antiparkinsonian. <1> Antipsychotic and antiemetic. <2> Anxiolytic and antifungal. <3> Antifungal and antiparkinsonian. <4> Antifungal and anti-migraine.
Output (English): pharmacology