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': '17 D vaccine is used for the prevention and control of- \nSelect and explain. \nA. Yellow fever, B. Japanese encephalitis, C. Haemorrhagic fever, D. Dengue', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]