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: Physiology
[{'content': 'The half life of plasma albumin is approximately \nSelect and explain. \nA. 7 days, B. 20 days, C. 60 days, D. 90 days', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]