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
[{'content': 'About ureter true is \nSelect and explain. \nA. 5 cm long, B. 25 cm long, C. 35 cm long, D. Totally retroperitoneal', 'role': 'user'}, {'content': 'Answer: B \nExplanation: 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', 'role': 'assistant'}]