Concept: This question tests your understanding of different types of placentation in flowering plants, which refers to the arrangement of ovules within the ovary.

Why (B) is correct: The figure shows a cross-section of an ovary where the ovules are attached to a central axis, and the ovary is divided into multiple chambers (locules) by septa. This arrangement is characteristic of axile placentation. Examples include tomato, lemon, and china rose.

Why other options are wrong:

• (A) Marginal: Ovules develop on the ridge along the ventral suture of a unilocular ovary (e.g., pea).
• (C) Parietal: Ovules develop on the inner wall of the ovary or on peripheral part, and the ovary is unilocular but appears two-chambered due to the formation of a false septum (e.g., mustard, Argemone).
• (D) Basal: The placenta develops at the base of the ovary, and a single ovule is attached to it (e.g., sunflower, marigold).

NEET Tip: Visualize the cross-section of fruits/ovaries of common plants to easily identify placentation types. Think of a sliced tomato for axile, a pea pod for marginal, and a cucumber for parietal (though cucumber is technically a type of parietal called free central in some classifications, it helps visualize peripheral attachment).

Correct Answer: (B)