This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidney and ureter, Subject name: Surgery
[{'content': 'Reflux of urine into the pelvis and calyces with mild dilatation with minimal blunting of fornices indicates which grade of VUR ? \nSelect and explain. \nA. Grade II, B. Grade III, C. Grade IV, D. Grade I', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Grade I Grade II Grade III Grade IV Grade V', 'role': 'assistant'}]