Step 1: Define placentation. Placentation is the arrangement of ovules inside the ovary, and we match each type with its example plant. Step 2: Marginal (A). In marginal placentation ovules lie along one ridge, as in pea, so A pairs with IV. Step 3: Axile (B). In axile placentation ovules attach to a central axis in a chambered ovary, as in tomato, so B pairs with II. Step 4: Parietal (C). In parietal placentation ovules sit on the inner ovary wall, as in Argemone, so C pairs with I. Step 5: Free central (D). In free central placentation ovules grow on a central axis with no septa, as in Primrose, so D pairs with III. Step 6: Assemble and conclude. The match A-IV, B-II, C-I, D-III is option 1. \[ \boxed{\text{A-IV, B-II, C-I, D-III}} \]
