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
Viruses causing hemorrhagic fever are - 
Select and explain. 
A. Lassa fever virus, B. Yellow fever virus, C. West Nile virus, D. Crimean Congo virus
A: Lassa fever virus
Answer: A: Lassa fever virus 
Explanation: Lessa virus is the most highly publicized of hemorrhagic fever REF:<\p> ANATHANARAYANAN MICROBIOLOGY NINTH EDITION PAGE.558