Task: Question Answering
Input (English): Question: Amantadine is a drug that can be used as: 
 Options:  <1> Antiviral and antiparkinsonian. <2> Antipsychotic and antiemetic. <3> Anxiolytic and antifungal. <4> Antifungal and antiparkinsonian. <5> Antifungal and anti-migraine.
Output (English): 1