Task: Text Categorization
Input (English): Question: Which of the following structural families of drugs act as neuroleptic agents? 
 Options:  <0> Benzothiazepines (diltiazem). <1> Butyrophenones (haloperidol). <2> Phenylpiperidines (pethidine). <3> Aryloxypropanolamines (atenolol). <4> 1,4-dihydropyridines (nifedipine).
Output (English): pharmacology