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
Back examination of polytrauma patient is done by which method:- 
Select and explain. 
A. Logroll, B. Barrel roll, C. Chin lift, D. primary survey
A: Logroll
Answer: A: Logroll 
Explanation: 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