In Brassicaceae, the flowers are zygomorphic
Brassica
Iberis, commonly known as candytuft is a genus of flowering plants belonging to family Brassicaceae. It comprises annuals, evergreen perennials and subshrubs. In Iberis, the flowers are zygomorphic. Zygomorphic flowers are the flowers having only one plane of symmetry (bilaterally symmetrical). So, the correct answer is 'Iberis'.