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 one of the following is frequent cause of serum alpha feto protein level greater than 10 times the normal upper limit - \nSelect and explain. \nA. Seminoma, B. Metastaic carcinoma of liver, C. Cirrhosis of liver, D. Oat cell tumour of lung', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Metastaic carcinoma of liver", 'role': 'assistant'}]