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
Normal poal vein pressure is - 
Select and explain. 
A. < 3 mm Hg, B. 3-5 mm Hg, C. 5-10 mm Hg, D. 10 to 1 2mm of Hg
C: 5-10 mm Hg
Answer: C: 5-10 mm Hg 
Explanation: Ans. is 'c' i.e., 5-10 mm Hg