## **Core Concept**
Cysticercosis is a tissue infection caused by the larval stage of the pork tapeworm (*Taenia solium*). This condition occurs when an individual ingests tapeworm eggs from contaminated food or water, leading to the release of oncospheres that penetrate the intestinal wall and disseminate to various tissues.

## **Why the Correct Answer is Right**
The correct answer, **subcutaneous tissue and muscles**, are the most commonly affected tissues in cysticercosis because the larvae (*Cysticercus cellulosae*) tend to lodge in these areas. After penetrating the intestinal wall, the oncospheres are carried through the bloodstream and lymphatic system to various parts of the body, where they develop into cysticerci, predominantly in muscles and subcutaneous tissues.

## **Why Each Wrong Option is Incorrect**
- **Option A:** While the central nervous system (CNS) can be affected, leading to neurocysticercosis, it is not the most common site; rather, it is a more severe manifestation.
- **Option B:** The liver is not typically highlighted as a primary site for cysticercosis; it's more commonly associated with other types of infections.
- **Option D:** The eyes can be involved, leading to ocular cysticercosis, but like the CNS, this is a less common but more serious form of the disease.

## **Clinical Pearl / High-Yield Fact**
A key clinical point to remember is that while neurocysticercosis (involvement of the CNS) represents a more severe and potentially life-threatening form of the disease, the majority of cases of cysticercosis are asymptomatic or mildly symptomatic, with the presence of subcutaneous nodules or muscle involvement being common findings.

## **Correct Answer:** . Subcutaneous tissue and muscles