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': 'Which one of the following antibody is produced rapidly and in high amounts during secondary response? \nSelect and explain. \nA. IgG, B. IgA, C. IgM, D. IgM and IgG', 'role': 'user'}, {'content': 'Answer: A \nExplanation: IgG antibodies are generated following class switching and maturation of the antibody response and thus paicipate predominantly in the secondary immune response Ref: Ananthanarayan & Panikers textbook of microbiology 9th edition pg:97', 'role': 'assistant'}]