This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Central Nervous System, Subject name: Pediatrics
[{'content': 'Which of these is a neural tube defect? \nSelect and explain. \nA. Spina bifida occulta, B. Encephalocele, C. Dermal sinus, D. All of these are NTD', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. D. All of these are NTDNeural tube defects are failure of closure of the neural tube between 3rd-4th weeks of intrauterine life. Important neural tube defects include spina bifida occulta, meningocele, meningomyelocele, dermal sinus, encephalocele, anencephaly, syringomyelia and diastematomyelia.', 'role': 'assistant'}]