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': 'Colorado tick fever is the only known human infection caused by \nSelect and explain. \nA. Reovirus, B. Coltivirus, C. Rotavirus, D. Corona virus', 'role': 'user'}, {'content': "Answer: B \nExplanation: Coltiviruses form another species within the Reoviridae. The virus paicle is 80 nm in diameter with a genome consisting of 12 segments of double-stranded RNA, totaling about 29 kbp. Colorado tick fever virus, transmitted by ticks, is able to infect humans.Reference:Jawetz, Melnick, & Adelberg's Medical Microbiology; 27th edition; Chapter 37; Reoviruses, Rotaviruses, and Caliciviruses", 'role': 'assistant'}]