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': 'Least reabsorption out of the following in the Nephron is - \nSelect and explain. \nA. Glucose, B. Urea, C. Na +, D. HC0', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Renal handling of various plasma constituents in a normal adult human on an average diet.', 'role': 'assistant'}]