This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Virology, Subject name: Microbiology
[{'content': 'The dengue fever virus is \nSelect and explain. \nA. Flavi virus, B. Echo virus, C. Entero virus, D. Ohomyxo virus', 'role': 'user'}, {'content': "Answer: A \nExplanation: Dengue (breakbone fever) is a mosquito-borne infection caused by a flavivirus that is characterized by fever, severe headache, muscle and joint pain, nausea and vomiting, eye pain, and rash.Ref: Jawetz, Melnick, & Adelberg's Medical Microbiology; Twenty-Seventh Edition; Chapter 38; Ahropod-Borne and Rodent-Borne Viral Diseases", 'role': 'assistant'}]