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: Surgery
[{'content': "'Tube cast' is applied for which of the following fractures? \nSelect and explain. \nA. Shoulder, B. Hip, C. Pelvis, D. Knee", 'role': 'user'}, {'content': 'Answer: D \nExplanation: Cylinder castor tube cast is used in the treatment of stable injuries of the distal femur, proximal tibia, and knee joint. It is worn for about 6-8 weeks. This cast often used for injuries around the knee, where rotation does not need to be controlled and the foot is to be left free. Ref: Essential ohopedics by Maheshwari 3rd Edition, Page 14, 126; A Complete Hospital Manual of Instruments and Procedures By Kapur, 2006, Page 628; Rockwood and Greens fractures in adults, 2009, Page 154.', 'role': 'assistant'}]