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': 'Soap bubble appearance at the lower end of the radius, the treatment of choice is - \nSelect and explain. \nA. Local excision, B. Excision and bone grafting, C. Amputation, D. Radiotherapy', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Treatment of choice for different sites is as follows.\n\n\nThe lower end of ulna, the upper end of fibula → \xa0Excision of a tumour\nLower end radius → \xa0Excision with reconstruction by ipsilateral fibula.\nAround knee (lower end of the femur or upper end of the tibia) → \xa0Excision with prosthetic replacement or arthrodesis.\n\n\nSmall tumours at any site are usually treated by curettage and bone grafting or cementing.', 'role': 'assistant'}]