Terror of Bengal is

Options

A. Anguilla bengalensis
B. Eichhornia crassipes
C. Clarias gariepinus
D. Parthenium histerophorum

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for the identification of a plant known as the "Terror of Bengal."

2. **Definition of Terror of Bengal**: The term "Terror of Bengal" refers to a plant that has a detrimental impact on aquatic ecosystems due to its rapid growth and reproduction.

3. **Characteristics of the Plant**: The plant in question reproduces quickly in water bodies such as rivers and lakes. It spreads rapidly and can cover large areas of water.

4. **Impact on Aquatic Life**: When the plant covers the water surface, it prevents sunlight and oxygen from reaching the aquatic organisms below. This lack of sunlight affects photosynthesis in aquatic plants, while the depletion of oxygen can suffocate fish and other aquatic life.

5. **Identifying the Plant**: The options provided include different plant species. The key is to identify which one is known as the "Terror of Bengal."

6. **Analyzing the Options**:
- Option A: Anguilla Bengalensis - Incorrect.
- Option B: Eichhornia crassipes - Correct, as this is the scientific name for the plant commonly known as water hyacinth, which is referred to as the "Terror of Bengal."
- Option C: Incorrect.
- Option D: Incorrect.

7. **Conclusion**: The correct answer is **Option B: Eichhornia crassipes**.