Twisted aestivation and axile placentation are found in:

Options

A. China rose
B. Dianthus
C. Sunflower
D. Mustard

Answer

To solve the question regarding twisted aestivation and axile placentation, we will analyze the options provided: China rose, Dianthus, and Mustard.

### Step-by-Step Solution:

1. **Understanding Aestivation and Placentation**:
- **Aestivation** refers to the arrangement of floral parts (like petals and sepals) in a flower bud before it opens.
- **Placentation** refers to the arrangement of ovules within the ovary of a flower.

2. **Analyzing the Options**:
- **China Rose (Hibiscus rosa-sinensis)**:
- Known for having **twisted aestivation** where the petals overlap each other in a twisted manner.
- It exhibits **axile placentation**, where the ovules are attached to the central axis of the ovary.

- **Dianthus**:
- Exhibits **valvate aestivation**, where the petals meet at the edges without overlapping.
- It has **free central placentation**, where the ovules are attached to a central column, not the walls of the ovary.

- **Mustard**:
- Displays **valvate aestivation** as well.
- The placentation is **parietal**, where the ovules are attached to the walls of the ovary.

3. **Conclusion**:
- Based on the characteristics of each option, **China Rose** is the only plant that has both twisted aestivation and axile placentation.

### Final Answer:
The correct answer is **China Rose**.

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