This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
[{'content': 'A patient with Miller Dieker syndrome on neuroimaging showed a smooth coex with no involutions. This condition of the brain where the convolutions are absent is called? \nSelect and explain. \nA. Holoprosencephaly, B. Lissencephaly, C. Rachischisis, D. Arhinencephaly', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Smooth cerebral coex with no convolutions is called Lissencephaly. It may be associated with microcephaly, developmental delay, seizure, optic nerve hypoplasia and microphthalmia. Holoprosencephaly means a single sphered brain. Rachischisis is congenital fissure of veebral column. Ref: Oxford Handbook of Clinical Specialities, Edition 8, Page - 139', 'role': 'assistant'}]