Which of the following statements is correct ?

Options

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

Answer

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

### Step-by-Step Solution:

1. **Evaluate the First Statement:**
- The first statement claims that Parthenium is an endemic species of our country.
- Definition: An endemic species is one that is native to a particular area and not found elsewhere.
- Analysis: Parthenium is actually an exotic or alien species that was introduced to India through imported wheat. It is not native to India.
- Conclusion: This statement is **incorrect**.

2. **Evaluate the Second Statement:**
- The second statement asserts that African catfish are not a threat to indigenous catfish.
- Analysis: African catfish are indeed invasive species that threaten native catfish populations by outcompeting them for resources.
- Conclusion: This statement is also **incorrect**.

3. **Evaluate the Third Statement:**
- The third statement claims that Steller's sea cow is an extinct animal.
- Analysis: Steller's sea cow was indeed an aquatic mammal that became extinct due to overexploitation shortly after it was discovered.
- Conclusion: This statement is **correct**.

4. **Evaluate the Fourth Statement:**
- The fourth statement states that Lantana is commonly known as Carrot Grass.
- Analysis: Lantana is a weed, but the common name "Carrot Grass" actually refers to Parthenium hysterophorus, not Lantana.
- Conclusion: This statement is **incorrect**.

### Final Conclusion:
The only correct statement among the options provided is that **Steller's sea cow is an extinct animal**.

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