This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology Pa 1 (Immune Response, Antigen-Antibody Reactions, Hypersensitivity, Structure of Immune System, Immunodeficiency Disorders), Subject name: Microbiology
[{'content': 'IgE is secreted by \nSelect and explain. \nA. Mast cell, B. Basophils, C. Eosinophils, D. Plasma cells', 'role': 'user'}, {'content': 'Answer: D \nExplanation: All the antibodies are secreted by plasma cells.IgE is also secreted by plasma cells Mast cellsexpress a high-affinity receptor (FceRI) for the Fc region ofIgE. hence mostly mast cellsare found coated with IgE . It is mostly extravascular in distribution*Normal serum contains only traces (a few nanogramsper ml) but greatly elevated levels are seen in atopic(type 1 allergic) conditions such as, hay fever and eczema.', 'role': 'assistant'}]