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': 'What  is  the  glomerular  filtration  rate (GFR)? \nSelect and explain. \nA. 25 mL/min, B. 50 mL/min, C. 100 mL/min, D. 125 mL/min', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]