Step 1: Understanding Fruit Classification
- Pineapple (Ananas comosus) belongs to Bromeliaceae, but its fruit type is Sorosis, not Syconus.
- Paddy (Oryza sativa) belongs to Poaceae, not Apiaceae, and its fruit type is Caryopsis, not Legume.
- Cucumis (Cucumber, Melon)
belongs to Cucurbitaceae, not Poaceae, and has a Pepo fruit.
- Jackfruit (Artocarpus heterophyllus) belongs to Moraceae and has a Sorosis fruit, which is correct.
Step 2: Identifying Incorrect Pairs
- (A), (B), and (C) contain incorrect classifications, making option (4) the correct answer.