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: Unknown
The latest AHA2010 for CPCR in basic life support by two individuals for cardiac external massage & ventilation in an adult is- 
Select and explain. 
A. 30-2, B. 15-1, C. 15-2, D. 30-l
A: 30-2
Answer: A: 30-2 
Explanation: Ans: A