Which plant shows axile placentation?

• A. China Rose, Tomato, Lemon
• B. Sunflower, Marigold
• C. Mustard, Argemone
• D. Dianthus, Primrose

Answer: (A)

Axile placentation occurs when the ovules are attached to a central column formed by tissue along the axis of a multilocular ovary; the locules are divided by septa that meet around this central placenta. In this arrangement, each locule contains ovules that line the central axis, and the ovary is typically multi-chambered with ovules arranged along that central core.

China Rose, Tomato, and Lemon all have ovaries that are divided into multiple locules with a central placental axis. The ovules are borne along that central axis inside the ovary, which is why this combination shows axile placentation.

Other groups tend to show different patterns, where ovules are arranged along the walls or margins rather than along a central axis, so their placentation is not axile.