Which of these is a neural tube defect?
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.