The correct option is
B Cypsela
A. Siliqua- This fruit develops from bicarpellary, syncarpous, bilocular and superior ovary with parietal placentation and a false septum called replum. For example, Brassica.
B. Silicula- It resembles siliqua but is short, broad and flat and possess few seeds. For example, Iberis.
C. Cypsela- This fruit develops from a unilocular, single-ovuled, inferior ovary of bicarpellary syncarpous gynoecium possessing basal placentation. For example, Helianthus (Sunflower).
D. Follicle- It develops from a unilocular superior monocarpellary ovary. For example, Pisum.
Hence the type of fruit found in sunflower is Cypsela. So, the correct answer is 'Cypsela'.