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In Marginal placentation, the placenta forms a ridge along the ventral suture of the ovary. This is characteristic of the Fabaceae family, such as Pea (A-IV).
In Axile placentation, the placenta is axial and the ovules are attached to it in a multilocular ovary. This is seen in Tomato (B-II).
In Parietal placentation, the ovules develop on the inner wall of the ovary or on peripheral part. This is seen in Argemone (C-I).
In Free central placentation, the ovules are borne on the central axis and septa are absent. This is seen in Primrose (D-III).
Combining the findings: A-IV, B-II, C-I, D-III. This corresponds to option (A).
Final Answer: (A)