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
A 10-mm calculus in the right lower ureter associated with proximal
hydroureterone-phrosis is best treated with 
Select and explain. 
A. ESWL, B. PCNL, C. Open ureterolithotomy, D. Ureteroscopic retrieval
D: Ureteroscopic retrieval
Answer: D: Ureteroscopic retrieval 
Explanation: None