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': 'Administration of all the following will provide uterine relaxation, except \nSelect and explain. \nA. Sevoflurane, B. Nitrous oxide, C. Nitroglycerine, D. Terbutaine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Nitrous oxide does not change uterine contractility in\xa0doses provided during delivery.', 'role': 'assistant'}]