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
Primary receptor cells of hearing is 
Select and explain. 
A. Suppoing cell, B. Tectorial membrane, C. Tunnel of Coi, D. Hair cell
D: Hair cell
Answer: D: Hair cell 
Explanation: Hair cells: are impoant receptor cells of hearing and transduce sound energy into electrical energy.