This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anitibody, Subject name: Microbiology
[{'content': "Immunoglobulin in peyer's patch is? \nSelect and explain. \nA. IgM, B. IgG, C. IgA, D. IgD", 'role': 'user'}, {'content': 'Answer: C \nExplanation: ANSWER: (C) IgAREF: Ananthnarayan 8th e p. 99The direct secretion of secretory IgA onto mucosal epithelia represents the major effector mechanism of mucosa-associated lymphoid tissue (MALT).IgA is the main immunoglobulin in secretions such as milk, saliva, and tears and in secretions of the respiratory, intestinal, and genital tracts. It protects mucous membranes from attack by bacteria and viruses.', 'role': 'assistant'}]