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': 'Tubular maximum for kidney in practice is actually less than the calculated value because ? \nSelect and explain. \nA. Different nephrons have different transpo maximum, B. Depends on GFR, C. Depends on renal blood flow, D. Depends on blood Pressure', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e., Different nephrons have different transpo maximum', 'role': 'assistant'}]