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: Unknown
[{'content': 'Superantigen include all, except: \nSelect and explain. \nA. TSST, B. Exfoliative toxin, C. Pyrogenic exotoxin, D. Cholera toxin', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Superantigens are certain proteinmolecules that activate very large number of T cells irrespective of antigenic specifities\nThey bind directly to lateral aspect of TCR β chain and activate upto 20% of the circulating T cells compared to conventional (0.001%) causing multisystem dysfunction.\nExamples :\nToxic shock syndrome toxin\nExfoliative toxin\nStaphylococcal anterotoxin\nPyrogenic exotoxin', 'role': 'assistant'}]