This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Renal physiology, Subject name: Physiology
[{'content': 'Which of the following ion is least absorbed in tubules? \nSelect and explain. \nA. Sodium, B. Urea, C. Creatinine, D. Glucose', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The urinary plasma ratio of Creatinine is 1:150 which shows the least reabsorption Glucose - 0, Sodium- 0.6, Urea- 60 Ref: Ganong 25th ed/page 679', 'role': 'assistant'}]