This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Parasympathetic System & Glaucoma, Subject name: Pharmacology
[{'content': 'Drug of choice for prophylaxis of motion sickness is \nSelect and explain. \nA. Scopolamine, B. Ondansetron, C. Metoclopramide, D. Domperidone', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Doc for prophylaxis of motion sickness is - Hyoscine (scopolamine) If hyoscine is not given in the option them first generation Antihistaminics (Promethazine) Ondansetron -Doc for chemotherapy / radiotherapy induced vomiting. Metoclopramide- prokinetic drug Domperidone (prokinetic drug) - D2 receptor antagonist Drug of choice for levo dopa induced vomiting Both Metaclopromide and Domperidone are used for postoperative, drug and disease induced nausea & vomiting.', 'role': 'assistant'}]