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: Radiology
[{'content': "The posterior iliac horn is characteristic of: \nSelect and explain. \nA. Nail-patella syndrome, B. Marfan's syndrome, C. Hurler syndrome, D. Acromegaly", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. Nail-patella syndrome', 'role': 'assistant'}]