This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anatomy & Physiology (Liver), Subject name: Surgery
[{'content': 'Normal portal vein pressure is - \nSelect and explain. \nA. 0-5 mmHg, B. 5-10mmHg, C. 10-15 mmHg, D. 15-20 mmHg', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., 5-10 mmHg o Normal portal vein pressure in 5-10 mmHg", 'role': 'assistant'}]