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': 'Difference between natural killer and cytotoxic cells is - \nSelect and explain. \nA. Interferon decreases natural killer activity, B. NK cell has CD4, C. Cytotoxic cell lyse IgG coated target cells, D. NK cell contain azurophilic granules', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Cytotoxic T cells have CD8 surface markers and MHC class 1 restriction which can recognise IgG coated target cells', 'role': 'assistant'}]