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: Gynaecology & Obstetrics
[{'content': 'All are tocolytics except : \nSelect and explain. \nA. Ritodrine, B. Terbutaline, C. Misoprostol, D. Nicardipine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Misoprostol', 'role': 'assistant'}]