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: Medicine
[{'content': 'Minnsesota tube is used for the control of variceal bleeding in portal hypertension has - \nSelect and explain. \nA. One lumen, B. Two lumen, C. Three lumen, D. Four lumen', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]