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': 'Leucocidin is produced by: September 2004 \nSelect and explain. \nA. Streptococcus, B. Staphylococcus, C. Pseudomonas, D. E. Coli', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B i.e. Staphylococcus', 'role': 'assistant'}]