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: Pediatrics
[{'content': "Most common cause of abdominal mass in neonates is \nSelect and explain. \nA. Neuroblastoma, B. Wilm's tumor, C. Distended bladder, D. Multicystic dysplastic kidneys", 'role': 'user'}, {'content': 'Answer: D \nExplanation: Multicystic dysplastic kidney(MCDK) is a condition that results from the malformation of the kidney during fetal development. The kidneyconsists of irregular cysts of varying sizes. Multicystic dysplastic kidney is a common type of renal cystic disease, and it is a cause of an abdominal mass in infants. Reference: GHAI Essential pediatrics, 8th edition', 'role': 'assistant'}]