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
The Sengstaken tube must maintain a pressure of ... To stop bleeding from varices - 
Select and explain. 
A. 20 mm Hg, B. 25 mm Hg, C. 35 mm Hg, D. 45 mm Hg
C: 35 mm Hg
Answer: C: 35 mm Hg 
Explanation: None