What is common to Lantana, Eichhornia and Africa catfish?
(a) All are endangered species of India.
(b) All are keystone species.
(c) All are mammals found in India.
(d) All are species are neither threatened nor indigenous species of India.

Options

A. All are endangered species of India.
B. All are keystone species.
C. All are mammals found in India.
D. All are species are neither threatened nor indigenous species of India.

Explanation

To solve the question "What is common to Lantana, Eichhornia, and African catfish?", we will analyze each option carefully.

### Step-by-Step Solution:

1. **Identify the Species**:
- Lantana: An ornamental plant introduced to India.
- Eichhornia (Water Hyacinth): Introduced for its beauty, particularly in Bengal.
- African Catfish: An aquatic species introduced into Indian rivers.

2. **Analyze Each Option**:
- **Option (a)**: "All are endangered species of India."
- This is incorrect. Lantana, Eichhornia, and African catfish are not classified as endangered species in India.

- **Option (b)**: "All are keystone species."
- This is also incorrect. Keystone species are those that have a disproportionately large effect on their environment relative to their abundance. The mentioned species do not fit this definition.

- **Option (c)**: "All are mammals found in India."
- This is incorrect. Lantana and Eichhornia are plants, and African catfish is a fish, not a mammal.

- **Option (d)**: "All these species are neither threatened nor indigenous species of India."
- This is correct. All three species are considered exotic or alien species that were introduced to India and have turned invasive. They are not indigenous to India and are not classified as threatened.

3. **Conclusion**:
- The correct answer is **(d)**: "All these species are neither threatened nor indigenous species of India."