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: Medicine
[{'content': 'The largest volume of water is reabsorbed in the nephron at the \nSelect and explain. \nA. Collecting duct, B. Proximal convoluted tubule, C. Ascending loop of Henle, D. Descending loop of Henle', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]