This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abdomen & Pelvis, Subject name: Anatomy
Portal vein starts at level of? 
Select and explain. 
A. L2, B. L3, C. L4, D. L5
A: L2
Answer: A: L2 
Explanation: Ans. A L2Ref: Netter's Clinical Anatomy, 3rd ed. pg. 202* Portal vein starts at level of L2 vertebra and is formed by junction of superior mesenteric vein and splenic vein. It is 8 cm long and lies behind the neck of pancreas.* Normal portal vein pressure is 5-10 mm Hg.