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': 'Influenza belongs to \nSelect and explain. \nA. Ohomyxoviridae, B. Retroviridae, C. Herpes virus, D. Pox virus', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ohomyxoviruses are medium-sized, 80 to 120-nm enveloped viruses exhibiting helical symmetry. The genome is linear, segmented, negative-sense, single-stranded RNA, totaling 10-13.6 kb in size. Segments range from 890 to 2350 nucleotides each. Ohomyxoviruses include influenza viruses that infect humans or animals.Ref: Jawetz, Melnick, & Adelberg's Medical Microbiology; Twenty-Seventh Edition; Chapter 29; General Propeies of Viruses", 'role': 'assistant'}]