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': 'About SUPERANTIGENS true is \nSelect and explain. \nA. Immune response is increased by 5%, B. Needs to be processed before presentation, C. They are presented by APCs to T cell, D. Directly attached to latrel aspect of TCR beta chain', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Super antigens are molecules that can interact with antigen-presenting cells (APCs) and T-lymphocytes in a non-specific manner.\xa0\nThese antigens do not involve the endocytic processing as required in typical antigen presentation.\xa0\nInteraction of superantigens with MHC class II molecules of the APC and the V~ domain of the T-lymphocytes receptor activates a large number of T-lymphocytes than conventional antigens.\xa0\nThis leads to massive cytokine expression and immuno-modulation.\nStaphylococcal enterotoxins, exfoliative toxin and some viral proteins are examples of superantigens.\n\nRef : textbook of microbiology, C P Baveja 5th edition pg no:95', 'role': 'assistant'}]