Species listed in Red Data Book are
(a) Vulnerable
(b) Threatened
(c) Endangered
(d) All the above

Options

A. Vulnerable
B. Threatened
C. Endangered
D. All the above.

Answer

To solve the question regarding the species listed in the Red Data Book, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Red Data Book**: The Red Data Book is a comprehensive inventory of the global conservation status of biological species. It is published by the International Union for Conservation of Nature (IUCN).

2. **Identify the Categories of Species**: The species listed in the Red Data Book are categorized based on their risk of extinction. The main categories include:
- Vulnerable
- Endangered
- Critically Endangered

3. **Analyze the Options**:
- (a) Vulnerable: This refers to species that are at risk of becoming endangered.
- (b) Threatened: This is a broader category that includes vulnerable, endangered, and critically endangered species.
- (c) Endangered: This refers to species that are at a higher risk of extinction than vulnerable species.
- (d) All the above: This option suggests that all the mentioned categories are included in the Red Data Book.

4. **Conclusion**: Since the Red Data Book includes species that are vulnerable, endangered, and threatened, the correct answer is (d) All the above.

### Final Answer:
(d) All the above

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