Erythrogenic toxin, hyaluronidase, and hemolysins S and O are extracellular products of which of the following?
A. Streptococcus pneumoniae
B. Streptococcus pyogenes
C. Viridans streptococci
D. Enterococcus faecalis
E. Streptococcus agalactiae
Answer: B. Streptococcus pyogenes
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