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
Steinstrasse is - 
Select and explain. 
A. Staining of stones, B. Stones because of stress, C. Failure of ESWL, D. Ureteric obstruction due to fragments in ureter
D: Ureteric obstruction due to fragments in ureter
Answer: D: Ureteric obstruction due to fragments in ureter 
Explanation: Ans. is 'd' i.e., Ureteric obstruction due to fragments in ureter