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': 'Following virus is of pox virus - \nSelect and explain. \nA. Variola, B. Coxsachie, C. ECHO, D. HHV', 'role': 'user'}, {'content': "Answer: A \nExplanation: Poxviruses classified into 6 genera. Among them, variola included in ohopoxviruses REF:ANATHANARAYAN AND PANIKER'S TEXTBOOK OF MICROBIOLOGY 9TH EDITION PAGE NO:561", 'role': 'assistant'}]