This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infection, Subject name: Medicine
[{'content': 'The principal vector of dengue virus- \nSelect and explain. \nA. Anopheles culicifacies, B. Aedes aegypti, C. Anopheles stephensi, D. Culex molestus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The principal vector of dengue is the mosquito Aedes aegypti, which breeds in standing water; collections of water in containers, water based air coolers & tyre drumps are a god environment for the vector in large cities. Reference: Harrison20th edition pg 879', 'role': 'assistant'}]