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': 'Teres major of liver is a remnant of: \nSelect and explain. \nA. Ductus venosus, B. Umblical aery, C. Ductus aeriosus, D. Left umbilical vein', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. Left umbilical vein', 'role': 'assistant'}]