This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Unknown
[{'content': 'The immunoglobulin mediates ADCC \nSelect and explain. \nA. IgM, B. IgA, C. IgG, D. IgE', 'role': 'user'}, {'content': 'Answer: C \nExplanation: IgG Antibody\no\xa0\xa0\xa0\xa0 Half life(23d),\no\xa0\xa0\xa0\xa0 High Serum concerntration (GAMDE) ,\nResponsible for-\no\xa0\xa0\xa0\xa0 Precipitation,\no\xa0\xa0\xa0\xa0 neutralization,\no\xa0\xa0\xa0\xa0 NK cell (ADCC)\no\xa0 Classical complement\nAppear late, indicates past / chronic infection', 'role': 'assistant'}]