This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
Vitelline vein forms 
Select and explain. 
A. Ligamentum venosum, B. Ligamentum teres, C. Poal vein, D. Coronary sinus
C: Poal vein
Answer: C: Poal vein 
Explanation: Inderbir Singh'sHuman embryology Tenth edition Pg 265 The pas of right and left vitelline that lie outside the substance of the liver undergo alterations leading to formation of poal vein 2 vitelline veins shows anastomosis before opening into sinus venosus that is 1dorsal and 2 ventral (proximal and distal). At dorsal anastomosis spleenic and superior mesentric vein joins vitelline vein poal vein is formed by:Dorsal anastomosis ventral anastomosis Right vitelline vein