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: Forensic Medicine
[{'content': 'Most impoant and potential agent that can be used in bioterrorism: Al 11 \nSelect and explain. \nA. Plague, B. Smallpox, C. Tuberculosis, D. C. botulinum', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Smallpox', 'role': 'assistant'}]