Which of the following is not a helminth ?

Options

A. Trypanosoma
B. Taenia
C. Ascaris
D. Wucheria

Answer

To solve the question "Which of the following is not a helminth?", we will follow these steps:

### Step 1: Understand the term "helminth"
Helminths are parasitic worms that belong to two main phyla:
- **Platyhelminthes**: Also known as flatworms, which include organisms like tapeworms.
- **Aschelminthes**: Also known as roundworms, which include organisms like Ascaris.

### Step 2: Analyze the options provided
We have four options to consider:
1. **Trypanosoma**
2. **Taenia**
3. **Ascaris**
4. **Vuchereria**

### Step 3: Identify each organism
- **Trypanosoma**: This is a protozoan parasite, not a worm. It causes diseases such as sleeping sickness.
- **Taenia**: This is a type of tapeworm, which falls under the category of flatworms (Platyhelminthes).
- **Ascaris**: This is a roundworm and belongs to the phylum Aschelminthes.
- **Vuchereria**: This is also a roundworm, specifically known for causing lymphatic filariasis.

### Step 4: Determine which is not a helminth
From the analysis:
- **Trypanosoma** is the only organism that is not a helminth, as it is a protozoan.

### Conclusion
The answer to the question "Which of the following is not a helminth?" is **Trypanosoma**.

---