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
False regarding streptococcus pyogenes 
Select and explain. 
A. Causes necrotizing fascitis, B. Beta hemolytic, C. M Protein is virulence factor, D. Resistant to bacitracin
D: Resistant to bacitracin
Answer: D: Resistant to bacitracin 
Explanation: A convenient method for the identification of Streptococcus pyogenes is based on Maxted's observation that they are more sensitive to bacitracin than other streptococci. Bacitracin sensitivity test: A filter paper disc of 0.04U is applied on the surface of an inoculated blood agar. After incubation, a wide zone of inhibition is seen with Streptococcus pyogenes and not with other streptococci. Reference: Textbook of Microbiology; Anathanarayan and paniker's; 10th edition; Page no: 216.