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: Social & Preventive Medicine
[{'content': 'In which year did the Kyoto Protocol conic into force? \nSelect and explain. \nA. 2001, B. 2003, C. 2005, D. 2007', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., 2005", 'role': 'assistant'}]