This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urinary tract, Subject name: Pathology
[{'content': 'Ureteral tumor occurs most frequently in- \nSelect and explain. \nA. Upper 1/3 of ureter, B. Middle 1/3 of ureter, C. Lower 1/3 of ureter, D. Equally along the length of ureter', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Cancer of the ureter (ureteral cancer) is a type of cancer that begins in the cells that line the inside of the tubes (ureters) that connect your kidneys to your bladder. Ureters are pa of the urinary tract, and they carry urine produced by the kidneys to the bladder. Ureteral cancer is uncommon', 'role': 'assistant'}]