Asteraceae or Compositae is a large and widespread family of flowering plants. It is commonly referred to as a composite family or sunflower family. In Asteraceae, the stamens are 5 rarely 4; epipetalous (stamens are attached to the petals), syngenesious (anthers are free and filaments are united), forming a tube which encloses style. Hence, epipetalous and syngenesious stamens occur in compositae.
So, the correct answer is option D

Syngenesious anthers and epipetalous stamens are found in Compositae.

Compositae, also known as Asteraceae, is one of the largest and most diverse families of flowering plants. It includes many familiar plants such as daisies, sunflowers, and chrysanthemums. This family is characterized by some unique floral features, including syngenesious anthers and epipetalous stamens.

Syngenesious Anthers:
- Syngenesious anthers are a characteristic feature of the Compositae family.
- In this type of anther arrangement, the anthers are fused together to form a tube around the style.
- The anther tube is composed of individual anthers, each with a separate filament, but they are joined together at their tips.
- This fused arrangement of anthers is also referred to as a synandrium.
- The syngenesious anthers in Compositae plants are usually attached to the corolla tube, surrounding the style.

Epipetalous Stamens:
- Epipetalous stamens refer to the stamens that are attached to the petals of a flower.
- In Compositae, the stamens are usually attached to the corolla tube, which is formed by the fusion of petals.
- The stamens are positioned in such a way that their filaments are attached to the corolla tube, while their anthers are positioned above the tube.
- This arrangement allows the anthers to be easily accessible to pollinators.

Significance:
The presence of syngenesious anthers and epipetalous stamens in Compositae has some significant implications for pollination and reproduction:
1. The fusion of anthers into a tube helps protect the pollen from rain, wind, and other environmental factors, ensuring efficient pollination.
2. The arrangement of stamens attached to the corolla tube facilitates the transfer of pollen to visiting insects or animals.
3. The exposed anthers make it easier for pollinators to collect pollen while visiting the flower, increasing the chances of successful pollination.

In conclusion, the presence of syngenesious anthers and epipetalous stamens in Compositae is a unique floral adaptation that enhances pollination efficiency. This characteristic feature is one of the defining traits of the Compositae family.