This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Diagnostic & Operative ENT, Subject name: ENT
[{'content': 'Otoacoustic emissions arise from? \nSelect and explain. \nA. Outer hair cells, B. Inner hair cells, C. Both, D. Organ of corti', 'role': 'user'}, {'content': "Answer: A \nExplanation: ANSWER: (A) Outer hair cellsREF: Dhingra's ENT 4th edition page 29 Repeat from December 2009 Otoacoustic Emissions (OAEs)They are low intensity sounds produced by outer hair cells of a normal cochlea and can be elicited by a very sensitive microphone placed in the external ear canal and an analysis by a computer. Sound produced by outer hair cells travels in a reverse direction:Outer hair cells -basilar membrane - perilymph - oval window - ossicles - tympanic membrane - ear canal,", 'role': 'assistant'}]