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: Microbiology
[{'content': 'IgG antibodies have a half-life of approximately \nSelect and explain. \nA. 1 hour, B. 1 day, C. 1 Week, D. 1 Month', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]