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': 'Treatment of Non-union of # shaft femur - \nSelect and explain. \nA. Open reduction with external fixation, B. Excision of the bone, C. Bone grafting with internal fixation with K-Nail, D. All of the following', 'role': 'user'}, {'content': "Answer: C \nExplanation: Treatment of choice is open the fracture site for bone grafting and internal fixation.\nInternal fixation technique may be : -\nIntramedullary interlock nailing (Preferred)\n\n\nIntramedullary 'K' nailing\nPlating (compression plaiting).", 'role': 'assistant'}]