This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Trauma, Subject name: Surgery
[{'content': 'Back examination of polytrauma patient is done by which method:- \nSelect and explain. \nA. Logroll, B. Barrel roll, C. Chin lift, D. primary survey', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Back examination of polytrauma patient is known as Logroll Back: Logroll - 5 people are required for examination of back, 3 for body, one for head & one for examining back; Per Rectum is done at this timeQ For log roll, ideal number of people required: 5Q Minimum number of people required for log roll: 4Q', 'role': 'assistant'}]