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: Unknown
All are mechanisms of bone conduction except: 
Select and explain. 
A. Vibrations of air column of the EAC, B. Vibrational inertia of ossicles, C. Vibration of the inner ear, D. Air conduction through the Tympanic Membrane
D: Air conduction through the Tympanic Membrane
Answer: D: Air conduction through the Tympanic Membrane 
Explanation: This is a method of air conduction, the other 3 are the mechanisms of bone conduction