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': 'Plasma cells are derived from: \nSelect and explain. \nA. T cells, B. B cells, C. Macrophages, D. Neutrophils', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. is \'b\' i.e., B cells(Ref: Robbin\'s 7th/e, p. 198, 199; Ananthanarayan, 9th/e, p. 136)* An antigen interacts with the B lymphocyte that shows the best "fit" by virtue of its immunoglobulin surface receptor. When antigen binds to this BCR, the B cell is stimulated to divide and form a clone (clonal selection). Such selected B cells proliferate and differentiate to become plasma cells that secrete antibody.', 'role': 'assistant'}]