This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Anatomy
[{'content': 'Most common cause of non-traumatic hemoperitoneum \nSelect and explain. \nA. Hepatic adenoma, B. Focal nodular hyperplasia, C. Hepatocellular carcinoma, D. Hemangioma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: .', 'role': 'assistant'}]