## **Core Concept**
The question pertains to the assessment of hearing, specifically focusing on the method categorized as subjective. Subjective tests of hearing rely on the patient's response to sound stimuli, contrasting with objective tests that measure physical responses.

## **Why the Correct Answer is Right**
The correct answer, **Audiometry**, is a subjective test because it requires the patient's active participation and response to sound stimuli. During audiometry, the patient indicates when they can hear sounds of varying frequencies and intensities, making it a subjective assessment of hearing threshold. This method directly evaluates a patient's hearing through their perception and response.

## **Why Each Wrong Option is Incorrect**
- **Option A:** Although not provided, if an option like "Otoscopy" were listed, it would be incorrect because otoscopy is an objective examination technique used to visually inspect the ear canal and eardrum, not assess hearing.
- **Option B:** Similarly, if an option such as "Tuning fork tests" were listed, while it could be considered somewhat subjective, it's often classified under objective hearing tests as it assesses lateralization and bone conduction through physical responses.
- **Option C:** If an option like "Impedance audiometry" were given, it's more objective as it measures the movement of the eardrum and middle ear bones without requiring the patient's subjective response to sound.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that subjective tests like audiometry are crucial for assessing the patient's hearing threshold and for diagnosing certain types of hearing loss, particularly sensorineural hearing loss. However, they require the patient's cooperation and are not suitable for very young children or non-responsive patients, in whom case objective tests are invaluable.

## **Correct Answer:** D. Audiometry