Ray florets have :

detailed solution

Correct option is D

Inferior ovary is found in flowers of guava, cucumber and ray florets of sunflower. In flowers having inferior ovary, the margin of thalamus grows upward enclosing the ovary completely and getting fused with it, the other parts of flower arise above the ovary.Half inferior ovary is found in plum, rose, peach. In half inferior ovary, the gynoecium is situated in the centre and other parts of the flower are located on the rim of the thalamus almost at the same level.In the hypogynous flower the gynoecium occupies the highest position while the other parts are situated below it. The ovary in such flowers is said to be superior, e.g., mustard, china rose and brinjal.