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: Surgery
[{'content': 'False about Dandy Walker malformation: \nSelect and explain. \nA. Hypoplasia of velmis, B. Microcephaly, C. Hydrocephalus, D. Ataxia', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Dandy Walker malformation is characterized by hypoplasia of vermis and cystic expansion of 4th\xa0ventricle thus leading to hydrocephalus and macrocephaly (not microcephaly).', 'role': 'assistant'}]