This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Genetics And Genetic Disorders, Subject name: Pediatrics
[{'content': 'What is your diagnosis: \nSelect and explain. \nA. Anencephaly, B. Iniencephaly, C. Myelomeningocele, D. Craniorachischisis', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. D. CranioschisisCranioschisis (Greek: "kranion - kranion" skull, and "schisis -skhi/sis;" - split), or dysraphism, is a developmental birth defect involving the skull. In this disease, the cranium fails to close completely (especially at the occipital region). Thus, the brain is exposed to the amnios, and eventually degenerates, causing anencephaly.Craniorachischisis is on the extreme end of the dysraphism spectrum, wherein the entire length of the neural tube fails to close', 'role': 'assistant'}]