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': 'Which of the following is not a group A bioterrorism agent - \nSelect and explain. \nA. Small pox, B. Hemorrhagic fever, C. Salmonella, D. Botulism', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Salmonella belongs to CDC category B.', 'role': 'assistant'}]