This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Genitourinary radiology, Subject name: Radiology
[{'content': "Bilateral 'Spider leg sign' on IVP suggestive of : \nSelect and explain. \nA. Renal stone, B. Polycystic kidney, C. Hypernephroma, D. Hydronephrosis", 'role': 'user'}, {'content': "Answer: B \nExplanation: - Bilateral 'Spider leg sign' indicates Polycystic Kidney(ADPKD).", 'role': 'assistant'}]