This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Microbiology
[{'content': 'which of the following is a category A bioterrorism agent ? \nSelect and explain. \nA. Bacillus anthracis, B. Nipah, C. Brucella, D. coxiella', 'role': 'user'}, {'content': 'Answer: A \nExplanation: CATEGORY A BIOTERRORISM AGENT 1 Anthrax= B anthracis 2 Botulism= Clostridium Botulinum toxin 3 plague =Yersinia pestis 4 Small pox =Variola major 5 Tularemia =Francisell tularensis 6 viral H&;morrhagic fever including =Filoviruses ref : ananthanaryana', 'role': 'assistant'}]