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': 'Perkins traction used in \nSelect and explain. \nA. Fracture shaft femur, B. Foot drop, C. CTEV, D. Developmental dysplasia of Hip', 'role': 'user'}, {'content': "Answer: A \nExplanation: Fracture shaft femur - Perkin's traction\nFoot drop - Toe raising splint\nCTEV - Dennis Brown splint\xa0\nDDH - Pavlick Hamers\n\xa0 \xa0 \xa0 \xa0 \xa0 \xa0Bachelor cast\n\xa0 \xa0 \xa0 \xa0 \xa0 \xa0Von Rosen splint", 'role': 'assistant'}]