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: Anaesthesia
[{'content': 'The latest AHA 2010 for CPCR in basic life suppo by two individuals for cardiac external massage & ventilation in adult is? \nSelect and explain. \nA. 30-2, B. 15-1, C. 15-2, D. 30-1', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., 30-2", 'role': 'assistant'}]