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': 'Portal hypertension following portal vein thrombosis are guided by -a) ↑ in splenic pulp pressureb) ↑ in portal vein pressurec) ↑ in hepatic vein pressured) Portal vein doppler study \nSelect and explain. \nA. abd, B. bcd, C. abc, D. ab', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Splenic pulp pressure gives a measure of the portal vein pressure. It can be measured by inserting a needle percutaneously.\nPortal vein Doppler study is the most useful noninvasive investigation for assessing thrombosis of the main portal vein branches.', 'role': 'assistant'}]