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: Pediatrics
[{'content': "Which is the commonest abdominal mass in neonate : \nSelect and explain. \nA. Wilm's tumor, B. Polycystic kidney, C. Neuroblastoma, D. Rhabdomyosarcoma", 'role': 'user'}, {'content': "Answer: C \nExplanation: The commonest intra - abdominal tumor in first two years of life\xa0→ Neuroblastoma.\nThe commonest intra - abdominal tumor between 2nd to 5th\xa0 year of life\xa0→ Wilm’s tumor.\nThe commonest intro - abdominal tumor in children (no age specification) → Neuroblastoma.\n\n(Wilm's tumor is the second most common abdominal tumor in children).\nRemember: \nThe commonest cause of abdominal mass in Newborn is Multiple dysplastic kidneys (if neoplasm or tumor has not been mentioned when asking for the commonest intra-abdominal mass, the answer will be multiple dysplastic kidneys).", 'role': 'assistant'}]