This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anaesthesia
[{'content': 'Drugs used to control post–operative vomitinga) Diazepamb) Phenobarbitonec) Aprepitantd) Droperidole) Ondansetron \nSelect and explain. \nA. acde, B. bde, C. abcd, D. abde', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Drugs used in PONY\n\nFor prevention :- Propofol, droperidol, metoclopramide, ondansetron.\nFor control (Treatment) :- Anticholinergics (Hyoscine), H1 antihistaminics (Promethazine), Neuroleptics (Droperidole), Prokinetics (Metoclopramide, domperidone, cisapride), 5-HT3 antagonists (ondansetron), SPA (Apretitant), Adjuvants (Dexamethasone, BZDs, Cannabinoids, Clonidine & ephedrine).', 'role': 'assistant'}]