This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Embryology, Subject name: Anatomy
[{'content': 'Proximal umbilical artery forms: \nSelect and explain. \nA. Superior vesical artery, B. Median umbilical fold, C. Lateral umbilical fold, D. Ligamentum teres', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. A Superior vesical arteryRef: Netter's Atlas of Human Embryology, 2012 ed. pg. 86Structure nameDerivativeObliterated umbilical arteryMedial umbilical ligamentProximal part of umbilical arterySuperior vesical arteryInferior epigastric arteryLateral umbilical foldLeft umbilical veinLigamentum teresRight umbilical veinDisappearsDuctus venosusLigamentum venosumUrachusMedian umbilical ligamentVitello-intestinal duct Meckel's diverticulum", 'role': 'assistant'}]