This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Pediatrics
[{'content': 'Ligamentum teres of the liver is a remnant of ________ \nSelect and explain. \nA. Umbilical aeries, B. Umbilical vein, C. Ductus venosus, D. Ductus aeriosus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ligamentum teres is a remnant of the umbilical vein. The vessels that are occluded soon after bih are in due to course replaced by fibrous tissue and forms the following ligaments: Fetal structure Adult structure Foramen ovale Fossa ovalis Umbilical vein Ligamentum teres Ductus venosus Ligamentum venosum Umbilical aeries Medial umbilical ligaments Ductus aeriosus Ligamentum aeriosum Note: the median umbilical ligament or Xander&;s ligament represents the remnant of the embryonic urachus The lateral umbilical ligaments are folds of peritoneum over the inferior epigastric aeries Ref: Nelson textbook of pediatrics 21st edition Pgno: 975', 'role': 'assistant'}]