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 terms and the options provided step by step.

### Step 1: Understand the Terms
- **Twisted Aestivation**: This refers to the arrangement of sepals or petals in a flower bud where they overlap each other in a specific direction. In twisted aestivation, each petal or sepal is twisted over the next one.
- **Axile Placentation**: This is a type of placentation where the ovules are attached to the central axis of the ovary, which is divided into two or more locules by septa.

### Step 2: Analyze the Options
We need to identify which of the given options exhibits both twisted aestivation and axile placentation.

1. **China Rose (Hibiscus rosa-sinensis)**: Known to have twisted aestivation and axile placentation.
2. **Dianthus**: Typically exhibits a different type of aestivation (valvate) and placentation.
3. **Sunflower (Helianthus)**: Generally has a different arrangement and does not fit the criteria.
4. **Mustard (Brassica)**: Exhibits a form of placentation but does not have twisted aestivation.

### Step 3: Conclusion
Based on the definitions and characteristics of the options:
- The correct answer is **A. China Rose** as it is the only plant that exhibits both twisted aestivation and axile placentation.

### Final Answer
**A. China Rose**

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