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': 'Which is the commonest incidentaloma detected in the liver - \nSelect and explain. \nA. Focal nodular hyperplasia, B. Haemangioma, C. Hepatocellular adenoma, D. Hydatid cyst', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]