The correct option is C Hemicyclic
Hemicyclic flower is the one in which the leaflets of the perianth are arranged in circles, and the stamens and pistils are in a spiral. It is a primitive plant structure. It is found in plants of the most primitive families, such as the Magnoliaceae, Ranunculaceae and Annonaceae
So, the correct answer is 'Hemicyclic'