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': 'True about streptococcus pyogenes are all except: \nSelect and explain. \nA. Causes only localized infection, B. Rheumatic fever is non-supporative complications, C. Erythrogenic toxin causes scarlet fever, D. Glomerulonephritis is due to antigenic cross-reactivity', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Causes only localized infection', 'role': 'assistant'}]