The insect eating fish used for controling mosquitoes is -

Options

A. Hilsa
B. Labio
C. Gambusia
D. Mistus

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the name of an insect-eating fish that is used to control mosquito populations.

2. **Analyzing the Options**: The options provided are:
- 1st option: Hilsa
- 2nd option: Labio
- 3rd option: Gambusia
- 4th option: Mistus

3. **Identifying the Correct Fish**:
- Hilsa is primarily known as a food fish and does not specifically target mosquito larvae.
- Labio is also not known for eating mosquito larvae.
- Mistus is not recognized for controlling mosquito populations either.
- Gambusia, on the other hand, is known for its ability to consume mosquito larvae, making it effective in controlling mosquito populations.

4. **Conclusion**: Based on the analysis, the correct answer is Gambusia, as it is specifically used to eat mosquito larvae and thus helps in controlling their population.

**Final Answer**: The insect-eating fish used for controlling mosquitoes is **Gambusia**.

---