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': 'Commonest cause of non–communicating hydrocephalus in children is – \nSelect and explain. \nA. Congenital anomaly, B. Perinatal injury, C. Post–inflammatory obstruction, D. Brain tumors', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Hydrocephalus \n\nHydrocephalus is characterized by an increased volume of CSF in association with progressive ventricular dilatation.', 'role': 'assistant'}]