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': 'The most likely cause of intermittent jaundice in elderly\nman is \nSelect and explain. \nA. Liver cirrhosis, B. Perlampullary carcinoma, C. CA head of pancreas, D. Hemolysis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Periampullary carcinoma causes intermittent jaundice (waxing and waning of jaundice).', 'role': 'assistant'}]