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: Microbiology
[{'content': 'Category A bioterrorism agents are-a) Ebolab) Yersiniac) Clostridium botulinumd) Rickettsiae) Cholera \nSelect and explain. \nA. abc, B. bcd, C. abe, D. acd', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]