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: Orthopaedics
[{'content': 'Russel traction is used for treatment of fracture shaft femur in which age group \nSelect and explain. \nA. <2 years, B. 2-10 years, C. >15 years, D. None', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]