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': "Baon's fracture of the wrist \nSelect and explain. \nA. Involves radio carpal subluxation, B. Is a severe form of a colles' fracture, C. Is often treated by open reduction and internal fixation, D. All of the above", 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Involves radio carpal subluxation', 'role': 'assistant'}]