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': 'Decrease in GFR is apparent in which of the following stages of Chronic Kidney Disease \nSelect and explain. \nA. Stage I, B. Stage II, C. Stage III, D. Stage IV', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer is B (Stage II): Kidney damage with mild decrease in GFR is classified as stage II of chronic Kidney Disease.', 'role': 'assistant'}]