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
Most potential route for transmission of Meningitis from CNS to Inner ear is: 
Select and explain. 
A. Cochlear Aqueduct, B. Endolymphatic sac, C. Vestibular Aqueduct, D. Hyl's fissure
A: Cochlear Aqueduct
Answer: A: Cochlear Aqueduct 
Explanation: 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.