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
Otoacoustic emissions arises from 
Select and explain. 
A. Inner hair cells, B. Outer hair cells, C. Both inner and outer hair cells, D. Organ of coi
B: Outer hair cells
Answer: B: Outer hair cells 
Explanation: 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