**Core Concept**
Rinne's test is a hearing assessment used to compare bone conduction and air conduction in the same ear, testing for **conductive hearing loss**. The test involves placing a tuning fork on the mastoid process and then near the ear, asking the patient which sound is louder. **Normal hearing** and **sensorineural hearing loss** typically yield a positive Rinne's test.

**Why the Correct Answer is Right**
A negative Rinne's test indicates that bone conduction is better than or equal to air conduction, suggesting a **conductive hearing loss**. This is because in conductive loss, the middle ear's ability to conduct sound is impaired, making bone conduction relatively louder. The mechanism involves the **ossicles** and the **tympanic membrane**, which are affected in conductive hearing loss.

**Why Each Wrong Option is Incorrect**
**Option A:** Not provided, assuming it's not the correct answer for a negative Rinne's test.
**Option B:** Not provided, but typically, a positive Rinne's test is associated with **sensorineural hearing loss** or **normal hearing**.
**Option C:** Not provided, but if it suggests a condition with better air conduction, it would not result in a negative Rinne's test.

**Why Each Wrong Option is Incorrect** (continued)
Assuming standard options, **Option D:** would be incorrect if it represents a condition not associated with conductive loss.

**Clinical Pearl / High-Yield Fact**
A key point to remember is that a negative Rinne's test is indicative of **conductive hearing loss**, which can be due to various causes such as **otitis media** or **otosclerosis**.

**Correct Answer:** D. Conductive hearing loss.