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
Which toxin of streptococcus cause hemolysis 
Select and explain. 
A. Streptolysin O, B. Streptolysin S, C. Streptodornanse, D. Hyaluronidase
B: Streptolysin S
Answer: B: Streptolysin S 
Explanation: Streptococci produces two hemolysins - streptolysin O and S. Streptolysin S is an oxygen stable hemolysin and is responsible for the hemolysis seen around streptococcal colonies on the surface of blood agar plates. It is called streptolysin S as it is soluble in serum. It is a protein but is not antigenic. Reference: Textbook of Microbiology; Anathanarayan and paniker's; 10th edition; Page no: 213