This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urology, Subject name: Anatomy
[{'content': 'In a survey, many children are examined and were found to have urogenital abnormalities. Which congenital anomaly is associated with an increased risk of bladder carcinoma ? \nSelect and explain. \nA. Medullary sponge kidney, B. Double ureter, C. Unilateral renal agensis, D. Bladder exstrophy', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Congenital anomalies associated with an increased risk of bladder cancer are: patent urachus exstrophy bladder Both increase the risk for adenocarcinoma.', 'role': 'assistant'}]