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': 'Bacitracin sensitive streptococci: \nSelect and explain. \nA. Steptococcus agalactiae, B. Streptococcus pyogenes, C. Enterococcus, D. Streptococcus viridans', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (b) Streptococcus pyogenes Ref Ananthanarayan 8/e, p 207, 9/e, p 210 "Sensitivity to hacitracin is employed as a convenient method for differentiating Str. pyogenes from other hemolytic streptococci." For details see answer no 20 of chapter 8.', 'role': 'assistant'}]