This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteriology, Subject name: Microbiology
[{'content': 'Which amongst the following biological agents carries the least potential for use as a biological weapon for microbial terrorism \nSelect and explain. \nA. Plague (Yersinia pestis), B. Small pox (variola major), C. Botulism (Cl. Botulinum), D. Brucellosis (Brucella sp)', 'role': 'user'}, {'content': 'Answer: D \nExplanation: * Plague, small pox and botulism are category A bioterrorism agents. * Brucella is category B Ref: Baveja textbook of microbiology; 4th edition', 'role': 'assistant'}]