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': "Waddell's trial does not include \nSelect and explain. \nA. Head injury, B. C1 vertebrae injury, C. Fracture shaft femur, D. Intra abdominal injury", 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]