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': 'Polytrauma patient back examination \nSelect and explain. \nA. log roll, B. Barrel role, C. Chin lift, D. None', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Answer- A. log rollOnce the patient has been evaluated anteriorln a log roll should be performed to inspect the back.One member of the team is responsible for maintaining in-line spinal stabilisation.', 'role': 'assistant'}]