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': 'Normal poal vein pressure is - \nSelect and explain. \nA. < 3 mm Hg, B. 3-5 mm Hg, C. 5-10 mm Hg, D. 10 to 1 2mm of Hg', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., 5-10 mm Hg", 'role': 'assistant'}]