This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fundamental Concepts, Subject name: Anaesthesia
Compression depth in CPR in Adults is? 
Select and explain. 
A. 1 inch, B. 2 inch, C. 3 inch, D. 4 inch
B: 2 inch
Answer: B: 2 inch 
Explanation: Ans. (b) 2 inchRef: 2010 International Consensus on Cardiopulmonary Resuscitation and Emergency Cardiovascular Care Science with Treatment Recommendations CoSTR