The common name of Raphanus sativus is radish.we all well known that radish is edible root..Thus, the ans is option A

Edible Root Plants

There are several plants that produce edible roots, but the correct answer to the question is option 'A' - Raphanus sativus, commonly known as radish. Let's explore why radish is the correct answer.

Raphanus sativus (Radish)

- Radish is a root vegetable that belongs to the Brassicaceae family. It is an edible root plant and is widely cultivated for its fleshy, taproot.
- The root of the radish is typically round or elongated, and it comes in various colors including red, white, purple, and black.
- Radishes are known for their crisp texture and peppery flavor, which makes them a popular addition to salads and other dishes.
- The root of the radish is the edible part of the plant, while the leaves and stems are also edible but are less commonly consumed.
- Radishes are rich in vitamins C and B6, as well as minerals such as potassium and folate. They are also a good source of dietary fiber.

Other Options

Let's briefly discuss the other options provided and why they are not the correct answer:

b) Brassica compestris
- Brassica compestris, also known as turnip, is another root vegetable that belongs to the Brassicaceae family.
- While the root of the turnip is edible, it is not the correct answer to this question.

c) Brassica oleracea
- Brassica oleracea is a species that includes several cultivars such as cabbage, kale, broccoli, and cauliflower.
- While some of these cultivars have edible parts that are above ground (such as the leaves or flower buds), the root itself is not typically consumed.

d) Eruca sativa
- Eruca sativa, commonly known as arugula or rocket, is an annual plant that is primarily cultivated for its leaves.
- While the leaves of arugula are edible and commonly used in salads and other dishes, the root is not typically consumed.

In conclusion, among the given options, Raphanus sativus (radish) is the correct answer as it is a plant that produces an edible root. The other options either produce edible parts above ground or have roots that are not commonly consumed.