The correct answer is (c), Rafflesia. Rafflesia arnoldii is the largest individual flower in the world, with a diameter of up to 1 meter and a weight of up to 11 kilograms. It is native to the rainforests of Sumatra and Borneo. The flower has a foul odor, which is thought to attract insects that help to pollinate it.
Lotus (a) is a genus of aquatic plants that includes about 70 species. The lotus flower is a symbol of purity and enlightenment in many cultures.
Sunflower (b) is a large, annual plant that is native to North America. The sunflower flower is a composite flower, which means that it is made up of many smaller flowers called florets.
Glory Lily (d) is a genus of flowering plants that includes about 20 species. The glory lily flower is a trumpet-shaped flower that is native to Africa.