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': 'Which of the following liver tumour has a propensity to invade the poal or hepatic vein - \nSelect and explain. \nA. Cavernous hemangioma, B. Hepatocellular carcinoma, C. Focal nodular hyperplasia, D. Hepatic adenoma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: All patterns of hepatocellular carcinoma have a strong propensity for invasion of vascular channels. Extensive intrahepatic metastasis ensues and occasionally long snake like masses of tumour invade the poal vein or inferior venacava, extending even into the right side of the hea". All other options given in the question are benign tumors of the liver and they neither invade the adjacent structures, nor do they metastasize to distant sites. Ref : Robbins illustrated 8/e p879', 'role': 'assistant'}]