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: Anatomy
Ligamentum teres of the liver is a remnant of? 
Select and explain. 
A. Ductus venosus, B. Umbilical aery, C. Peritoneum, D. Left umbilical vein
D: Left umbilical vein
Answer: D: Left umbilical vein 
Explanation: "Ligamentum teres of liver represents the obliterated left umbilical vein".Ligamentum teres (the obliterated umbilical vein) runs along the inferior edge of the falciform ligament from the umbilicus to the umbilical fissure.