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: Gynaecology & Obstetrics
[{'content': 'Ligamentum teres is formed from which of the following embryologic structure? \nSelect and explain. \nA. Umbilical aery, B. Umbilical vein, C. Urachus, D. Persistent vitellointestinal duct', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ligamentum teres of the liver is a remnant of left umbilical vein. Medial umbilical ligaments is a remnant of Umbilical aeries. Ligamentum venosum is a remnant of ductus venosus. Ligamentum aeriosum is a remnant of ductus aeriosus. Ref: Human Embryology 6th Ed Page 259.', 'role': 'assistant'}]