This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, 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: In few cases, foramen ovale remains patent throughout life and gives rise to cyanosis, a condition called as Morbus caeruleus.(Refer: Nelson's Textbook of Pediatrics, SAE, 1st edition, pg no. 2162)", 'role': 'assistant'}]