Green book contains :-

Options

A. The list of endangered plants
B. The list of extinct plants
C. The list of rare plants grown in Lotanical gardens
D. Flora of certain area

Answer

**Step-by-Step Solution:**

1. **Understanding the Green Book**: The Green Book is a reference book that contains information about certain types of plants.

2. **Identifying the Content**: Specifically, the Green Book lists rare plants. These are plants that are not commonly found and may be at risk of becoming endangered or extinct.

3. **Context of Rare Plants**: The rare plants listed in the Green Book are often cultivated in botanical gardens. Botanical gardens play a crucial role in conserving these plants by providing the necessary conditions for their growth.

4. **Purpose of the Green Book**: The main purpose of the Green Book is to help in the conservation of rare plants, ensuring that they do not become extinct. This is vital for biodiversity.

5. **Differentiating from Other Books**: It is important to note that the Green Book is different from other conservation books. For example, the Red Book contains information about endangered and extinct plants, while a herbarium is used for cataloging flora of specific areas.

6. **Conclusion**: Therefore, the Green Book contains a list of rare plants that are grown in botanical gardens.

**Final Answer**: The Green Book contains a list of rare plants.

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