This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Anatomy
Which branch of poal vein is involved in chronic pancreatitis 
Select and explain. 
A. Superior mesenteric vein, B. Inferior mesenteric vein, C. Left branch of poal vein, D. Splenic vein
D: Splenic vein
Answer: D: Splenic vein 
Explanation: ,