This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: JIPMER 2017, Subject name: Anatomy
[{'content': 'Upper covering layer of cochlear duct is \nSelect and explain. \nA. Basilar membrane, B. Tectorial membrane, C. Stria vascularis, D. Vestibular membrane', 'role': 'user'}, {'content': "Answer: D \nExplanation: Reissner's membrane - between Scala vestibuli & Scala media. Basilar membrane - between scala media & Scala tympani Tectorial membrane - covers the hair cells. Stria vascularis gives the endolymph which is ultrafiltrate of blood.", 'role': 'assistant'}]