Task: Text Categorization
Input (English): Question: (-) - Deprenyl (or selegiline) is a propargylamine that is used in the treatment of Parkinson's disease because it is: 
 Options:  <0> Dopamine D2 receptor agonist. <1> Dopamine antagonist. <2> COMT inhibitor. <3> Dopamine prodrug. <4> Suicide inhibitor of the MAO-B.
Output (English): pharmacology