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': 'Abduction of the thigh is limited by : September 2009 \nSelect and explain. \nA. Ischiofemoral ligaments, B. Pubofemoral ligaments, C. Iliofemoral ligaments, D. Sacroiliac ligament', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B: Pubofemoral ligaments', 'role': 'assistant'}]