A disease caused by helminth parasite is

Options

A. Diphtheria
B. Filaria
C. Malaria
D. Fluorosis

Answer

To answer the question "A disease caused by helminth parasite is," we will analyze the provided options and identify which one is associated with helminth parasites.

### Step-by-Step Solution:

1. **Understanding Helminths**:
- Helminths are parasitic worms, which include flatworms (like tapeworms) and roundworms (like nematodes). They are known to cause various diseases in humans and animals.

2. **Analyzing the Options**:
- **Diphtheria**: This disease is caused by the bacterium Corynebacterium diphtheriae, which produces toxins. Thus, it is not caused by a helminth.
- **Filaria**: This disease is caused by filarial worms, which are a type of helminth. The most common filarial diseases include lymphatic filariasis and river blindness.
- **Malaria**: This disease is caused by Plasmodium parasites, which are protozoans, not helminths.
- **Fluorosis**: This condition is caused by excessive fluoride intake, not by a helminth.

3. **Identifying the Correct Answer**:
- Among the options provided, the only disease caused by a helminth parasite is **filaria**.

4. **Conclusion**:
- Therefore, the correct answer to the question is **filaria**.

### Final Answer:
A disease caused by helminth parasite is **filaria**.