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': 'Most impoant structure preventing uterine proapse is : \nSelect and explain. \nA. Round ligament, B. Broad ligaments, C. Cardinal ligament, D. Uterosacral ligament', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Cardinal ligament', 'role': 'assistant'}]