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: Pediatrics
[{'content': 'Anatomical closure of Ductus Arteriosus takes place at \nSelect and explain. \nA. At Birth, B. 10-12 hours after birth, C. 1 week after birth, D. 2-3 weeks after birth', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Functional closure happens 10-12 hours after birth. Anatomical closure takes place at 2-3weeks after birth.', 'role': 'assistant'}]