**Core Concept**
Auditory receptors are specialized sensory cells responsible for detecting sound waves and transmitting this information to the brain for interpretation. These receptors are found in the inner ear, specifically within the cochlea.

**Why the Correct Answer is Right**
The correct answer is the part of the inner ear where auditory receptors are located. The cochlea is a spiral-shaped structure filled with a fluid called endolymph and contains specialized sensory cells called hair cells. These hair cells have hair-like projections called stereocilia that are embedded in the basilar membrane, which vibrates in response to sound waves. This vibration triggers a mechanical response in the hair cells, leading to the generation of electrical signals that are transmitted to the auditory nerve and eventually to the brain.

**Why Each Wrong Option is Incorrect**
**Option A:** The vestibule is a part of the inner ear responsible for balance and equilibrium, not auditory perception.
**Option B:** The stapes bone is one of the three bones in the middle ear that transmits sound waves to the inner ear, but it does not contain auditory receptors.
**Option C:** The auditory nerve is responsible for transmitting electrical signals from the inner ear to the brain, but it is not where the auditory receptors are located.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that the cochlea is divided into two parts: the basal end, which is responsible for detecting high-pitched sounds, and the apical end, which detects low-pitched sounds.

**Correct Answer: C. Cochlea. Inner ear structure containing auditory receptors.**