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': 'Immunoglobulins are produced by - \nSelect and explain. \nA. Macrophages, B. B-cells, C. T-cells, D. NK-cells', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Immunoglobulin (Ig),is a large, Y-shaped protein produced mainly by plasma cells that is used by the immune systema Ref: Ananthanarayan & Panikers textbook of microbiology 9th edition pg:94', 'role': 'assistant'}]