This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ear, Subject name: ENT
[{'content': 'Site where endolymph is seen: \nSelect and explain. \nA. Scala vestibuli, B. Scala media, C. Helicotrema, D. Scala tympani', 'role': 'user'}, {'content': 'Answer: B \nExplanation: (b) Scala media(Ref. Scott Brown, 8th ed., Vol 2, page 545)Endolymph is present in the membranous labyrinth, whereas perilymph is present in the bony labyrinth.Hence scala vestibuli, scala tympani and their interconnection helicotrema, which are parts of bony labyrinth, are filled with perilymph.Scala media, utricle, saccule and semicircular canals, which are parts of membranous labyrinth, are filled with endolymph.', 'role': 'assistant'}]