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': 'Apart from T & B lymphocytes, the other class of lymphocytes is - \nSelect and explain. \nA. Macrophages, B. Astrocytes, C. NK cells, D. Langerhans cells', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Lymphoid cells\n\nThe cells of the lymphoid system are lymphocytes.\n\n\nOn the basis of function and surface markers, there are two major types of lymphocytes-\n\n\nT- cells\nB- cells\n\n\nWhen circulating lymphocytes are classified by their surface markers into T and B cells, about 5-10 percent of cells are found to lack features of either type they are called null cells/Large granular lymphocytes.\nLarge granular lymphocytes include:\n\n\xa0 \xa0 \xa0 \xa0 \xa0 \xa0- Natural killer cells (N.K Cells)\n\xa0 \xa0 \xa0 \xa0 \xa0 \xa0- Antibody-dependent cytotoxic cells/killer cells (ADCC).\n\xa0 \xa0 \xa0 \xa0 \xa0 \xa0- Lymphokine-activated killer cells (LAK cells).', 'role': 'assistant'}]