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:\n(A)Ebola\n(B)Yersinia\n(C)Clostridium botulinum\n(D)Rickettsia\n(E)Cholera \nSelect and explain. \nA. A,B,C, B. B,D,A, C. C,A,B, D. E,A,C', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Category A\nAnthrax (£tocr7/us anthracis) Botulism (Clostridium botulinum toxinQ Plague (Yersinia pestis) Q Smallpox (Variola major) Tularemia (Franciselia tularensis) Viral hemorrhagic fevers Arenaviruses:\nLassa, New World (Afiachupo, Junin, Guanarito, and Sabia) Bunyaviridae:\nCrimean Congo, Ri Valley Filoviridae: Ebola, Marburg Category B Brucellosis (Brucella spp.)\nEpsilon toxin of Clostridium perfringens Food safety threats {e.g.t Salmonella spp.,\nEscherichia coli 0157:H7, Shigella) Glanders (Burkholderia mallei) Melioidosis (B. pseudomaliei) Psittacosis (Chiamydophila psittaci) fever  Water safety\nthreats (e.g., Vibrio cholerae, Cryptosporidium parvum) Category C Emerging infectious diseases threats such as Nipah, hantavirus, SARS coronavirus, and pandemic influenza', 'role': 'assistant'}]