**Core Concept**
Alport syndrome is a genetic disorder characterized by progressive kidney disease, hearing loss, and eye abnormalities. The Fln1 gene encodes for the protein alpha-actinin-4, which is essential for the integrity of the glomerular basement membrane.

**Why the Correct Answer is Right**
The diagnostic criteria for Alport syndrome as proposed by Flinter et al. include a combination of clinical features such as:
- Hematuria (blood in the urine) and/or proteinuria (excess protein in the urine)
- Sensorineural hearing loss
- Anterior lenticonus (a condition affecting the lens of the eye)
- Family history of the disorder
- Electron microscopy findings of characteristic glomerular basement membrane ultrastructural abnormalities

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it is a characteristic feature of Alport syndrome. Hematuria and/or proteinuria are common manifestations of the disorder.
* **Option B:** This option is incorrect because it is also a characteristic feature of Alport syndrome. Sensorineural hearing loss is a common complication of the disorder.
* **Option C:** This option is incorrect because it is not a diagnostic criterion for Alport syndrome. While some patients may have anterior lenticonus, it is not a universal feature of the disorder.

**Clinical Pearl / High-Yield Fact**
Alport syndrome is inherited in an X-linked dominant pattern, meaning that the gene responsible for the disorder is located on the X chromosome and affects males more frequently than females.

**Correct Answer:** D.