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
Primary receptor cells of hearing - 
Select and explain. 
A. Supporting cell, B. Tectorial membrane, C. Tunnel ofcorti, D. Hair cell
D: Hair cell
Answer: D: Hair cell 
Explanation: Ans. is 'd' i.e., Hair cells o Sense organ of hearing-Organ of Cortio Sensory cells of hearing-Hair cells (mainly outer)o Sensory receptors of hearing-Hair (cilia) of hair ceils