This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Special Senses, Subject name: Physiology
The organ of Coi normally contains: 
Select and explain. 
A. A single row of inner hair cells and a single row of outer hair cells, B. 3-4 rows each of inner and outer hair cells, C. A single row of inner hair cells and 3-4 rows of outer hair cells, D. A single row of outer hair cells and 3-4 rows of inner hair cells
C: A single row of inner hair cells and 3-4 rows of outer hair cells
Answer: C: A single row of inner hair cells and 3-4 rows of outer hair cells 
Explanation: Organ of Coi organ for transduction of sound. Hair cells are receptor cells in organ of Coi There is a single row of inner hair cells (toward the center of cochlea) and 3-4 rows of outer hair cells (on the outer side). Each row contains about 3000 hair cells.