**Core Concept**
Cysticercosis is a parasitic infection caused by the larval stage of the pork tapeworm (Taenia solium) that affects the human brain. The clinical manifestations of cysticercosis are diverse and depend on the location and number of cysts, as well as the host's immune response.

**Why the Correct Answer is Right**
The most common neurological manifestation of cysticercosis is seizures, which occur due to the presence of cysts in the brain. This is because the cysts can induce an inflammatory response, leading to the destruction of surrounding brain tissue and the formation of a seizure focus. The inflammation can also cause damage to the surrounding neural tissue, including the cerebral cortex, hippocampus, and basal ganglia. **Seizures** are often the presenting symptom of cysticercosis and can range from simple partial seizures to generalized tonic-clonic seizures.

**Why Each Wrong Option is Incorrect**
**Option B:** Neuropathy is not a typical presentation of cysticercosis. While neuropathy can occur due to the compression of nerves by cysts, it is less common than seizures.
**Option C:** Encephalitis is not a characteristic presentation of cysticercosis. Cysticercosis can cause inflammation in the brain, but it typically does not present as encephalitis.
**Option D:** Muscular hypertrophy is not associated with cysticercosis. Cysticercosis primarily affects the nervous system and muscles are not typically involved.

**Clinical Pearl / High-Yield Fact**
Cysticercosis is often referred to as a "silent disease" because it can go undiagnosed for years, and symptoms may not appear until the cysts have caused significant damage to the brain.

**Correct Answer:** a. Seizure