This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'What is the embryolgical remnant of median umbilical ligament? \nSelect and explain. \nA. Urachus, B. Allantois, C. Amnion, D. Yolk sac', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Median umbilical ligament is a remnant of urachus If patent urachus in adults, urine dribbles from umbilicus known as wheeping umbilicus', 'role': 'assistant'}]