This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: KUB & Adrenal Gland, Subject name: Anatomy
[{'content': 'The narrowest part of the ureter is at the - \nSelect and explain. \nA. Uretero - pelvic junction, B. Hiac vessel crossing, C. Pelvic ureter, D. Uretero - vesical junction', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e. Uretero-vesical junction Normal Uterer has 3 distinct site of narrowing.at ureteropelvic junctionwhere the ureter crosses the iliac vesselsat ureterovesical junction (narrowest part)", 'role': 'assistant'}]