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
[{'content': 'Which of the following is known as Panton-Valentine toxin \nSelect and explain. \nA. Leucocidin of Staphylococcus aureus, B. Alpha toxin of Clostridium perferingens, C. DNAase of Staphylococcus pyogenes, D. None of the above', 'role': 'user'}, {'content': "Answer: A \nExplanation: Panton-valentine leucocidin (called PVL) is a two-component toxin, like gamma lysin, being composed of the S and F components. Such bicomponent, membrane-active toxins have been grouped as synergohymenotropic toxins. Ref: Textbook of Ananthanarayan and paniker's; 10th Edition; Pg:204", 'role': 'assistant'}]