This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Central Nervous system, Subject name: Pharmacology
Pimozide belongs to class of: 
Select and explain. 
A. Thiothixanthene, B. Phenothiazine, C. Butyrophenone, D. Diphenyl butyl piperidine
D: Diphenyl butyl piperidine
Answer: D: Diphenyl butyl piperidine 
Explanation: Thioxanthenes are flupenthioxol. Butyrophenones are haloperidol, trifluperidol , penfluridol. Phenothiazines are Chlorpromazine, triflupromazine , thioridazine, flufenazine. Promazine belongs to the group of other of other hetero cyclics that is diphenyl butyl piperidine. Ref: KD Tripathi 8th ed.