This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: ENT
[{'content': 'The function of middle ear is- \nSelect and explain. \nA. Impedence matching, B. Conveing sound energy into electric energy, C. Increase in intensity of sound, D. Helps in equilibrium', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans: A. Impedence matching(Ref: Dhingra's S'h/e p. 18; Tuli L't/e p. 35)The middle ear ossicles provide a pathway for sound to travel from the outer to the inner ear.Opposition to sound energy transfer is known as impedance.The ossicles exist to help overcome the effect of impedance by impedance matching, thus permitting more sound energy to be transmitted from the outer to the inner ear.", 'role': 'assistant'}]