Solution

In Cruciferae, gynoecium is bicarpellary, syncarpous with unilocular ovary which later becomes bilocular due to false septation. It shows parietal placentation.
In Cucurbitaceae, gynoecium is tricarpellary, syncarpous with unilocular ovary in parietal placentation.
In Liliaceae, gynoecium is tricarpellary, syncarpous with trilocular ovary in axile placentation.
In Solanaceae, gynoecium is bicarpellary, syncarpous with bilocular ovary in axile placentation with swollen placenta. Oblique septum occurs in ovules.
Therefore, the correct answer is option B.