The organ of cort A. External ear

B. Middle ear

C. Semi circular canal

D. Cochlea

Cochlea

Explanation:

Corti is present in cochlea. The organ of Corti is the sensitive element in the inner ear and can be thought of as the body's microphone. It is situated on the basilar membrane in one of the three compartments of the Cochlea. It contains four rows of hair cells which protrude from its surface.