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: Surgery
[{'content': "Commonest intra-abdominal tumour below 2 years ? \nSelect and explain. \nA. Neuroblastoma, B. Wilm's tomour, C. Hepatoblastoma, D. Lymphomaeoplasia", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. is \'a\' i.e., Neuroblastoma "Of all childhood neoplasms, Neuroblastoma is exceeded in frequency only be leukemia and brain tumors."-CSDT', 'role': 'assistant'}]