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: Surgery
Spider-leg appearance is seen in: March 2010 
Select and explain. 
A. Pyelonephritis, B. Polycystic kidney, C. Renal aery stenosis, D. Ureteric stones
B: Polycystic kidney
Answer: B: Polycystic kidney 
Explanation: Ans. B: Polycystic kidney