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
Minnsesota tube is used for the control of variceal bleeding in portal hypertension has - 
Select and explain. 
A. One lumen, B. Two lumen, C. Three lumen, D. Four lumen
D: Four lumen
Answer: D: Four lumen 
Explanation: None