This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Physiology
[{'content': 'Half-life of albumin is \nSelect and explain. \nA. 36-48 hours, B. 3-5 days, C. 5-10 days, D. 20 days', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Albumin has a high capacity for binding water (approximately 18 ml/g), an intravasal residence time of approximately 4 h presupposing physiological capillary permeability as well as an in vivo half-life of approximately 18-21 days . Ref: guyton and hall textbook of medical physiology 12 edition page number: 418,419,420', 'role': 'assistant'}]