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
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 
Select and explain. 
A. abd, B. bcd, C. abc, D. ab
A: abd
Answer: A: abd 
Explanation: Splenic pulp pressure gives a measure of the portal vein pressure. It can be measured by inserting a needle percutaneously.
Portal vein Doppler study is the most useful noninvasive investigation for assessing thrombosis of the main portal vein branches.