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': 'Viruses causing hemorrhagic fever are - \nSelect and explain. \nA. Lassa fever virus, B. Yellow fever virus, C. West Nile virus, D. Crimean Congo virus', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Lessa virus is the most highly publicized of hemorrhagic fever REF:<\\p> ANATHANARAYANAN MICROBIOLOGY NINTH EDITION PAGE.558', 'role': 'assistant'}]