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: Pathology
[{'content': 'Immunoglobulins are formed by? \nSelect and explain. \nA. Plasma cells, B. T-cells, C. B-cells, D. Macrophages', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Plasma cells are the antibody-secreting cells. On contact with its appropriate antigen, the mature B cell\xa0undergoes clonal proliferation. The majority of activated B cells are transformed into plasma cells and\xa0secrete antibodies\nWhile plasma cell is the best antibody-producing cell, lymphocytes, lymphoblasts and transitional cells\xa0may also synthesise Ig to some extent.', 'role': 'assistant'}]