Which of the following components of Steptococcus pyogenes are non-antigenic, i.e., do not elicit the host to produce antibodies against it, thus it is an important virulence factor
A. Group Specific Carbohydrate Antigen (Lancefield's Classification)
B. F Protein
C. Capsule
D. Streptolysin-O
E. M Protein
Answer: C. Capsule
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