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 between 2-5 years ? \nSelect and explain. \nA. Neuroblastoma, B. Wilm's tumour, C. Hepatoblastoma, D. Lymphoma", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Neuroblastoma", 'role': 'assistant'}]