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': 'Most common malignancy of liver in children is: \nSelect and explain. \nA. Hepatoblastoma, B. Hepatocellular carcinoma, C. Lymphoma, D. None of the above', 'role': 'user'}, {'content': "Answer: A \nExplanation: Hepatoblastoma is the most common malignancy of the liver in children, with most of these tumors diagnosed before 4 years of age. Hepatocellular carcinoma is the next most common, with a peak incidence between 10 and 15 years of age. Ref: Schwaz's principle of surgery 9th edition, chapter 39.", 'role': 'assistant'}]