This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abdomen and pelvis, Subject name: Anatomy
About ureter true is 
Select and explain. 
A. 5 cm long, B. 25 cm long, C. 35 cm long, D. Totally retroperitoneal
B: 25 cm long
Answer: B: 25 cm long 
Explanation: Abdominal ureter. The ureter is roughly 25-30 cm long in adults and courses down the retroperitoneum in an S curve. At the proximal end of the ureter is the renal pelvis; at the distal end is the bladder. The ureter begins at the level of the renal aery and vein posterior to these structures . Ref - BDC 6e vol2 pg 318