This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
[{'content': 'Lassa fever virus belongs to family \nSelect and explain. \nA. Arenaviridae, B. Bunyaviridae, C. Flaviviridae, D. Reoviridae', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Answer- A. ArenaviridaeThere are two main phylogenetic branches of Arenaviridae: the Old World viruses, such as lassa fever and lymphocytic choriomeningitis (LCM) viruses.', 'role': 'assistant'}]