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': "In 65 year old male with history of fracture neck of femur 6 weeks old,treatment of choice - \nSelect and explain. \nA. SP nailing, B. Mc Murray's osteotomy, C. Hemiarthroplasty, D. None", 'role': 'user'}, {'content': 'Answer: C \nExplanation: Treatment of choice for 6 weeks old fracture in a 65-year-old patient is hemiarthroplasty either bipolar (preferred) or monopolar AMR.', 'role': 'assistant'}]