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: Pathology
[{'content': 'Commonest "Benign" Tumor of Liver is : \nSelect and explain. \nA. Hamatoma, B. Hemangioma, C. Adenoma, D. Adenoma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Hemangioma', 'role': 'assistant'}]