This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Unknown
[{'content': 'a renal mass seen on prenatal check up is most probably- \nSelect and explain. \nA. Wilm’stumor, B. Mesoblastic nephroma, C. Neuroblastoma, D. Renal sarcoma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: (Refer: Nelson’s Textbook of Pediatrics, SAE, 1st edition, pg no. 2467)\n\xa0\nPrental renal tumours\n\nEnlargement of a kidney on prenatal imaging is usually due to hydronephrosis or a cystic renal enlargement, such as multicystic dysplastic kidney or polycystic disease\nSolid tumors of the kidneys are rarely seen in the antenatal period, but can be diagnosed by ultrasound.\xa0 Most develop properly as the baby is growing in the womb.', 'role': 'assistant'}]