This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Eye, Nose and Ear, Subject name: Anatomy
Perilymph enters the subarachnoid space the 
Select and explain. 
A. Cochlear duct, B. Ductus Reuniens, C. Perilymphatic Duct, D. Vestibular Aqueduct
C: Perilymphatic Duct
Answer: C: Perilymphatic Duct 
Explanation: C. The perilymph enters the subarachnoid space of the posterior cranial fossa the cochlear aqueduct, which contains the perilymphatic duct.