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
The police has brought an unresponsive patient to you. What is the first thing you will do? 
Select and explain. 
A. Sta chest compressions immediately, B. Check carotid pulse, C. Check for response and call help, D. Sta rescue breaths
B: Check carotid pulse
Answer: B: Check carotid pulse 
Explanation: Ans: B. Check carotid pulse(Ref BLS/ACLS Guidelines: hups://www.resus.org.uk/resuscitation guidelines /adult-advanced-life-suppo; Harrison 19/e p1768; Braunwald's 10/e p844-845)According to Adult Basic Life Suppo (BLS) algorithm in an unresponsive patient, next step is to check carotid pulse.