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': 'Meningomyelocele with progressive hydrocephalus is commonly seen in \nSelect and explain. \nA. Arnold chiari II, B. Choroid plexus papilloma, C. Dandy walker malformation, D. Vein of Galen malformation', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Hydrocephalus + Meningomyelocele\xa0⇒ Seen in Arnold chiari II', 'role': 'assistant'}]