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': 'Gamma nail is used in treatment of \nSelect and explain. \nA. Fracture neck femur, B. Intertrochanteric femur fracture, C. Ankle arthrodesis, D. Hip arthrodesis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Smith Peterson Nail -\xa0Fracture neck femur\xa0\nGamma Nail - Intertrochanteric femur fracture\nCobra Plates - Hip arthrodesis', 'role': 'assistant'}]