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': 'In morbus caeruleus foramen ovole closes after - \nSelect and explain. \nA. 6 months, B. 2 years, C. 1 year, D. Never', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Never o In few cases foramen ovale remains patent throughout life give rise to cyanosis, a condition called morbus caeruleus.", 'role': 'assistant'}]