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
[{'content': 'Which of the following structure in foetal life becomes ligamentum teres in adult life? \nSelect and explain. \nA. Umbilical aery, B. Umbilical vein, C. Ductus venosus, D. Poal radicles', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The left umbilical vein persists as a channel that carries blood from the placenta through ductus venosus to the hepatic poion of the inferior venacava (IVC) while the right umbilical vein regresses. After bih, the left umbilical vein forms the ligamentum teres and the ductus venous the ligamentum venosum respectively.', 'role': 'assistant'}]