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: Surgery
[{'content': 'Snow storm appearance and loose bodies of knee joint is seen in: \nSelect and explain. \nA. Chondromalacia patella, B. Ewings sarcoma, C. Chondromatosis synoe, D. Lateral band syndrome', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Chondromatosis synoe', 'role': 'assistant'}]