The secondary host of tapeworm (taenia solium ) is

Options

A. Snail
B. Pig
C. Human being
D. Dog

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: We need to identify the secondary host of the tapeworm known as Taenia solium.

2. **Defining Hosts**: In parasitology, a parasite often has two types of hosts: a primary host and a secondary (or intermediate) host. The primary host is where the parasite reaches maturity and causes disease, while the secondary host is where the parasite develops into a larval stage.

3. **Identifying the Primary Host**: For Taenia solium, the primary host is humans. In humans, the tapeworm matures and reproduces.

4. **Identifying the Secondary Host**: The secondary host is the one that harbors the larval stage of the parasite. In the case of Taenia solium, this host is pigs. Pigs can ingest the eggs of the tapeworm from contaminated environments.

5. **Life Cycle of Taenia solium**: The life cycle involves the eggs being excreted in human feces, contaminating the soil. Pigs, which often live in such contaminated environments, can ingest these eggs. Inside the pig, the eggs develop into larval forms.

6. **Conclusion**: Based on the information gathered, the secondary host of Taenia solium is the pig.

**Final Answer**: The secondary host of tapeworm (Taenia solium) is **Option 2: Pig**.

---