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': 'Uterosacral ligament contains \nSelect and explain. \nA. Mainly plain muscle, B. Sympathetic and parasympathetic nerves, C. Contain uterine vessels, D. Ureters', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Uterosacral ligaments are composed almost entirely of connective tissue and very little plain muscle. They contain sympathetic and parasympathetic nerves.', 'role': 'assistant'}]