This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Microbiology
[{'content': 'Virulence factors of Staphylococcus aureus include all of the following except one. Which one is the exception? \nSelect and explain. \nA. Beta-lactamases, B. Coagulase, C. Enterotoxins, D. M Protein', 'role': 'user'}, {'content': 'Answer: D \nExplanation: M proteins are virulence factors of group A Streptococci (Streptococcus pyogenes). All of the other listed virulence factors may be found routinely in S. aureus bacteria.', 'role': 'assistant'}]