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': 'Dengue fever is transmitted by \nSelect and explain. \nA. Aedes aegypti, B. Cluex vishnuii, C. Cluex fatigans, D. Glossina palpalis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]