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': 'Virulence determinant implicated in pathogenesis of scarlet fever is - \nSelect and explain. \nA. Hyaluronidase, B. M protein, C. Pyrogenic exotoxin, D. Streptokinase', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Pyrogenic exotoxin", 'role': 'assistant'}]