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': 'False about Streptococcus pyogenes \nSelect and explain. \nA. Causes necrotizing fasciitis, B. Beta haemolytic, C. M protein is the virulence factor, D. Resistant to bacitracin', 'role': 'user'}, {'content': "Answer: D \nExplanation: A convenient method for the identification of S.pyogenes is based on Maxted's observation that they are more sensitive to bacitracin than other streptococci. a filter paper disc of 0.04 U is applied on the surface of an inoculated blood agar. After incubation, a wide zone of inhibition is seen with S.pyogenes, but not with other streptococci. Ref: Textbook of microbiology; Ananthanarayan and paniker's; 10th edition; Pg:217, 218", 'role': 'assistant'}]