This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Central Nervous system, Subject name: Pediatrics
[{'content': 'Which one of the following is the common cause of Congenital Hydrocephalus is ? \nSelect and explain. \nA. Craniosynostosis, B. Intra uterine Meningitis, C. Aquedectal stenosis, D. Malformations of Great vein of Galen', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Aqueductal stenosis is the most common cause of congenital hydrocephalus.', 'role': 'assistant'}]