Explanation:

When we talk about the structure of a flower, the ovary is a significant part of it. The ovary is the female reproductive organ of a flower that contains one or more ovules where the development of seeds takes place. The position of the ovary in relation to the other floral parts helps in determining its structure and classification.

In the given options, the correct answer is option D - soybean and groundnut. Let's understand why:

Monocarpellary Superior Ovary:
- A monocarpellary ovary consists of a single carpel, which is the female reproductive structure.
- Superior ovary means that the ovary is positioned above the attachment point of the other floral parts.
- In this type of ovary, the other floral parts, such as the sepals, petals, and stamens, are attached below the ovary.

Soybean and Groundnut:
- Soybean (Glycine max) and Groundnut (Arachis hypogaea) are examples of flowering plants that have monocarpellary superior ovaries.
- In both these plants, the ovary is located above the attachment point of the sepals, petals, and stamens.
- The ovary of soybean and groundnut develops into a legume, which is a dry fruit that splits open along two sutures to release the seeds.

Other Options:
- Mango and Tulip: These flowers do not have a monocarpellary superior ovary. Mango has a multicarpellary ovary, and Tulip has an inferior ovary.
- Indigofera and Pea: These flowers also have multicarpellary ovaries and do not have a superior position. Indigofera has an inferior ovary, and Pea has a half-inferior ovary.
- Belladonna and Sesbania: These flowers have superior ovaries, but they are multicarpellary. Belladonna has a bicarpellary ovary, and Sesbania has a multicarpellary ovary.

Therefore, the correct answer is option D - soybean and groundnut, as they have a monocarpellary superior ovary.

The correct answer is soyabean , ground nut , hibiscus