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': 'IgE is secreted by - \nSelect and explain. \nA. Mast cell, B. Basophils, C. Eosinophils, D. Plasma cells', 'role': 'user'}, {'content': 'Answer: D \nExplanation: IgE is synthesised by plasma cells. Monomers of IgE consist of two heavy chains (e chain) and two light chains, with the e chain containing 4 Ig-like constant domains Reff: Ananthanarayanan & Panikers textbook of microbiology 9th edition pg:136', 'role': 'assistant'}]