This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology, Subject name: Microbiology
[{'content': 'Which of the following cell does not have cytotoxic activity - \nSelect and explain. \nA. NK cells, B. Cytotoxic T-cells, C. Helper T-cells, D. Antibody dependent cells', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Helper T-cells Cytotoxicity of different cells* Natural killer cellsNot antibody dependentNot MHC restricted* Cytotoxic T-cellsClass I MHC restrictedNot antibody dependent* Antibody dependent cytotoxic T-cells (ADCC) (a type of null cell)Antibody dependentNot MHC restricted", 'role': 'assistant'}]