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: Anatomy
[{'content': 'Which of the following prevents hyperextension of thigh \nSelect and explain. \nA. Ischiofemoral ligament, B. Iliofemoral ligament, C. Pectofemoral ligament, D. Puboischial ligament', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B. i.e. Iliofemoral ligament', 'role': 'assistant'}]