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
Jack stone calculi is seen in which anatomic pa ? 
Select and explain. 
A. Prostate, B. Kidney, C. Ureter, D. Bladder
D: Bladder
Answer: D: Bladder 
Explanation: Ans. is 'd' i.e., Bladder