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: Pharmacology
[{'content': 'Concentration of adrenaline in CPR is ? \nSelect and explain. \nA. 1: 10 lakhs, B. 1 : 1 lakhs, C. 1 : 10,000, D. 0.736111111', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., 1:1000 Epinephrine (1 : 1000 concentration) is the drug of choice in CPR.", 'role': 'assistant'}]