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': 'A 1 year old child presenting with abdominal mass and calcification on X – \n rays is suggestive of : \nSelect and explain. \nA. Teratoma, B. Neuroblastoma, C. Wilms tumour, D. Rhabdomyosarcoma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Both neuroblastoma and wilms tumor can present with abdominal mass and calcification.\nBut, at 1 year, it is most likely neuroblastoma.\nThe mean age of presentation of wilms tumor is 3 years.', 'role': 'assistant'}]