Go through the following matches
(i) China rose - Twisted aestivation
(ii) Calotropis - Valvate aestivation
(iii) Gulmohur - Ascending imbricate aestivation
(iv) Pea - Descending imbricate aestivation
Which of these are correct ?

Options

A. (i), (ii) and (iii)
B. (ii), (iii) and (iv)
C. (i), (iii) and (iv)
D. All are correct.

Answer

To determine which of the matches regarding the arrangement of estivation in the listed plants is correct, we need to analyze each plant and its corresponding type of estivation.

### Step-by-Step Solution:

1. **Understanding Estivation**:
- Estivation refers to the arrangement of sepals and petals in a flower bud before it opens. It describes how these floral parts overlap or are arranged relative to each other.

2. **Analyzing Each Match**:
- **(i) China rose - Twisted aestivation**:
- In China rose (Hibiscus rosa-sinensis), the petals are arranged in a twisted manner, where each petal overlaps the next one.
- **Conclusion**: This match is **correct**.

- **(ii) Calotropis - Valvate aestivation**:
- In Calotropis (Calotropis gigantea), the petals are arranged in a valvate manner, where the edges of the petals touch but do not overlap.
- **Conclusion**: This match is **correct**.

- **(iii) Gulmohur - Ascending imbricate aestivation**:
- In Gulmohur (Delonix regia), the petals are arranged in an ascending imbricate manner, where some petals overlap each other in a specific order.
- **Conclusion**: This match is **correct**.

- **(iv) Pea - Descending imbricate aestivation**:
- In Pea (Pisum sativum), the petals are arranged in a descending imbricate manner, where the outer petals overlap the inner petals.
- **Conclusion**: This match is **correct**.

3. **Final Conclusion**:
- Since all the matches are correct, the answer to the question is that **all the options are correct**.

### Final Answer:
All the matches are correct.