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': 'Streptolysin O functionally & structurally related to -a) Tetanolysinb) Pneumolysinc) Streptolysin Sd) Clostridium perfringens O toxine) Listeriolysin \nSelect and explain. \nA. abcd, B. bcde, C. abde, D. ade', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]