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': 'Otoacoustic emissions arises from \nSelect and explain. \nA. Inner hair cells, B. Outer hair cells, C. Both inner and outer hair cells, D. Organ of coi', 'role': 'user'}, {'content': 'Answer: B \nExplanation: OAE: 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 analyzed by a computer. The sound produced by outer hair cells travels in a reverse direction: outer hair cells - basilar membrane - perilymph - oval window - ossicles - tympanic membrane - ear canal. Ref: Dhingra; 6th Edition; pg no 27', 'role': 'assistant'}]