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
Bilateral 'Spider leg sign' on IVP suggestive of : 
Select and explain. 
A. Renal stone, B. Polycystic kidney, C. Hypernephroma, D. Hydronephrosis
B: Polycystic kidney
Answer: B: Polycystic kidney 
Explanation: - Bilateral 'Spider leg sign' indicates Polycystic Kidney(ADPKD).