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': 'Subpubic angle is : \nSelect and explain. \nA. <65deg, B. 65-75deg, C. 85deg, D. 110-120deg', 'role': 'user'}, {'content': 'Answer: C \nExplanation: 85deg', 'role': 'assistant'}]