Which of the following statements is correct?

Options

A. Partheniunm is an endemic species of our country .
B. African catfish is not a threat to indigenous catfishes.
C. Rauwolfia vomitoria growing in different Himalayan ranges produces an active chemical called as reserpine .
D. Lantana is popularly known as carrot grass.

Answer

To solve the question regarding which statement is correct, we will analyze each of the four statements provided.

### Step-by-Step Solution:

1. **Analyze Statement 1:**
- **Statement:** Parthenium is an endemic species of our country.
- **Analysis:** Parthenium, also known as Carrot Grass, is not endemic to India; it is an alien species that was introduced from the Americas. Therefore, this statement is **incorrect**.

2. **Analyze Statement 2:**
- **Statement:** African catfish is not a threat to indigenous catfishes.
- **Analysis:** The African catfish has been introduced for aquaculture purposes and poses a significant threat to indigenous catfish species due to competition and predation. Thus, this statement is also **incorrect**.

3. **Analyze Statement 3:**
- **Statement:** Ronwolfia vomitoria growing in different Himalayan ranges produces an active chemical called Reserpine.
- **Analysis:** This statement is **correct**. Ronwolfia vomitoria is known to grow in the Himalayan region and is indeed known for producing Reserpine, which is an active chemical used in medicine.

4. **Analyze Statement 4:**
- **Statement:** Lantana is popularly known as Carrot grass.
- **Analysis:** This statement is **incorrect**. Lantana is not known as Carrot grass; Parthenium is the plant commonly referred to as Carrot grass. Lantana is also an alien species, but it is distinct from Parthenium.

### Conclusion:
The only correct statement among the options provided is **Statement 3**: "Ronwolfia vomitoria growing in different Himalayan ranges produces an active chemical called Reserpine."