Axile placentation is a type of arrangement of ovules within the ovary of a flower. In this type of placentation, the ovules are attached to the central axis or column of the ovary. The ovary is divided into several chambers or locules, and each locule contains one or more ovules. This type of placentation is commonly found in fruits like lemons.

Example of Axile Placentation

The correct answer for this question is option 'B' - Lemon.

Explanation:

Lemon is a citrus fruit that belongs to the Rutaceae family. It is a good example of axile placentation. Here's how the axile placentation is observed in lemons:

- The lemon fruit is derived from the ovary of a lemon flower. The ovary is located at the base of the flower and contains several chambers or locules.
- Each locule of the ovary contains numerous ovules that are attached to the central axis or column of the ovary.
- The ovules are arranged in a radial pattern around the central axis, resembling the spokes of a wheel.
- As the lemon fruit develops, the ovules within each locule undergo fertilization and transform into seeds.
- The central axis of the ovary, which is called the placenta, elongates and develops into the white, spongy tissue known as the pith or mesocarp.
- The pith is surrounded by the juicy, acidic segments of the lemon fruit, which develop from the ovary walls.

Key Points:

- Axile placentation is characterized by the attachment of ovules to the central axis or column of the ovary.
- Lemon is an example of a fruit that exhibits axile placentation.
- In axile placentation, the ovules are arranged in a radial pattern around the central axis of the ovary.
- The lemon fruit develops from the ovary of a lemon flower, with the ovules undergoing fertilization and transforming into seeds.
- The central axis of the ovary elongates and develops into the pith, while the ovary walls form the juicy segments of the lemon fruit.

In conclusion, the example of axile placentation is lemon.