Which of the following statement is correct

Options

A. Parthenium is an endemic species of our country
B. African catfish is not a threat to indigenous catfishes
C. Steller's sea cow is an extinct animal
D. Lantana is popularly known as carrot grass

Explanation

To determine which statement is correct among the given options, we need to analyze each statement one by one.

### Step-by-Step Solution:

1. **Evaluate the First Statement:**
- **Statement:** Parthenium is an endemic species of our country.
- **Analysis:** Parthenium hysterophorus, commonly known as Parthenium, is actually a native species of the Americas and is considered an invasive species in many countries, including India. Therefore, this statement is incorrect.

2. **Evaluate the Second Statement:**
- **Statement:** African catfish is not a threatened indigenous catfish.
- **Analysis:** The African catfish (Clarias gariepinus) is indeed not considered a threatened species, and it is widely distributed. However, it is not indigenous to all regions where it is found. This statement can be misleading, but it is not outright incorrect.

3. **Evaluate the Third Statement:**
- **Statement:** Stela sea cow is an extinct animal.
- **Analysis:** The Steller's sea cow (Hydrodamalis gigas) was indeed an extinct marine mammal that was hunted to extinction in the 18th century. This statement is correct.

4. **Evaluate the Fourth Statement:**
- **Statement:** Lantena is popularly known as carrot grass.
- **Analysis:** Lantana camara is commonly known as Lantana, but it is not referred to as carrot grass. Carrot grass is actually a different plant. Therefore, this statement is incorrect.

### Conclusion:
After evaluating all the statements, the correct answer is:
- **Stela sea cow is an extinct animal.**