**Core Concept**
Kaagener's Syndrome, also known as primary ciliary dyskinesia, is a rare genetic disorder characterized by abnormal movement of cilia in the respiratory tract and fallopian tubes. The underlying cause of infertility in this condition is related to the impaired movement of cilia in the fallopian tubes, which disrupts the normal process of fertilization and embryo transport.

**Why the Correct Answer is Right**
In Kaagener's Syndrome, the cilia in the fallopian tubes are unable to generate the normal beating motion required for the transport of the oocyte (egg) and sperm interaction. This leads to a failure of fertilization and subsequent infertility. The impaired ciliary movement also affects the normal clearance of debris and bacteria from the respiratory tract, contributing to recurrent respiratory infections.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it does not address the specific mechanism of infertility in Kaagener's Syndrome.
* **Option B:** This option is incorrect because it suggests a different underlying cause of infertility that is not related to the impaired ciliary movement.
* **Option C:** This option is incorrect because it implies a different type of genetic disorder that affects fertility.

**Clinical Pearl / High-Yield Fact**
Infertility in Kaagener's Syndrome is often associated with chronic respiratory infections and sinusitis, highlighting the importance of a comprehensive evaluation and management plan for patients with this condition.

**Correct Answer:** C. Impaired ciliary movement in the fallopian tubes disrupts fertilization and embryo transport, leading to infertility in Kaagener's Syndrome.