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: ENT
[{'content': "Most potential route for transmission of Meningitis from CNS to Inner ear is: \nSelect and explain. \nA. Cochlear Aqueduct, B. Endolymphatic sac, C. Vestibular Aqueduct, D. Hyl's fissure", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Most potential route for transmission of Meningitis from CNS to Inner ear is Cochlear Aqueduct. The scala tympani is closed by secondary tympanic membrane; it is also connected with the subarachnoid space through the aqueduct of cochlea. Hence the infections from meninges can spread to inner ear.', 'role': 'assistant'}]