The correct option is A Angiosperm
Angiosperm, any of about 300000 species of flowering plants, the largest and most diverse group in the plant kingdom.
Angiosperms represent approximately 80 percent of all the known green plants now living. The angiosperms are vascular seed plants in which the ovule (egg) is fertilized and develops into a seed in an enclosed hollow ovary.
So, the correct answer is "Angiosperms"