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': 'Cell type which lacks HLA antigen is: \nSelect and explain. \nA. Monocyte, B. Thrombocytes, C. Neutrophil, D. Red blood cell', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Red Blood cell Class IMHC molecules are expressed on all nucleated cells and plateletsClass II MHC molecules are expressed on antigen presenting cells (macrophages, dendritic and B cells)TissueMHC class IMHC class nLymphoid tissues T cells++++B cells++++++Macrophages+++++Other antigen-presenting cells (eg Langerhans' cells)++++++Epithelial cells of the thymus++++Other nucleated cells Neutrophils+++-Hepatocytes+-Kidney+-Brain+-Non -nucleated cells Red blood cells--Thrombocytes+-", 'role': 'assistant'}]