China rose has

Options

A. Parietal placentation, twisted aestivation , monodelphous, perigynous flower.
B. Axile placentation , twisted aestivation , monodelphous , hypogynous flower.
C. Parietal placentation , volvate aestivation , diadelphous , perigynous flower.
D. Axile placentation , valvate aestivation , diadelphous , hypogenous flower .

Answer

### Step-by-Step Solution

1. **Understanding the Question**: The question asks about the characteristics of the China rose, specifically focusing on its astivation, placentation, and stamens.

2. **Astivation**:
- **Definition**: Astivation refers to the arrangement of sepals and petals in a floral bud.
- **Type in China Rose**: The type of astivation in China rose is **twisted astivation**. In twisted astivation, one margin of a petal or sepal overlaps the next one, creating a spiral arrangement.

3. **Placentation**:
- **Definition**: Placentation is the arrangement of ovules within the ovary.
- **Type in China Rose**: The type of placentation in China rose is **exile placentation**. In this type, the ovules are attached to a central placenta in a multilocular ovary.

4. **Condition of Stamens**:
- **Definition**: Stamens are the male reproductive structures in flowers.
- **Type in China Rose**: The condition of stamens in China rose is **monoadolphous**, meaning that all the stamens are united into a single bundle.

5. **Type of Flower**:
- **Definition**: The arrangement of floral parts in relation to the ovary.
- **Type in China Rose**: The flowers of China rose are **hypogynous**, where the ovary is situated above the other floral parts.

6. **Conclusion**: Therefore, the characteristics of China rose are:
- **Astivation**: Twisted
- **Placentation**: Exile
- **Stamens**: Monoadolphous
- **Flower Type**: Hypogynous

### Final Answer
The correct characteristics of China rose are:
- Twisted astivation
- Exile placentation
- Monoadolphous stamens
- Hypogynous flowers