The correct option is D Pelvic vein
The anterior abdominal vein is a part of the hepatic portal system. It is a median vein formed by the union of two pelvic veins, the ventral branches of the femoral veins. It runs forwards along the middle line of the ventral body wall to the level of liver, where it leaves the body-wall and divides into right and left branches. So, the correct answer is option D.