Question: Ferns belong to any one of about 12,000 species of plants grouped in their own division within the plant kingdom. Ferns are vascular, seedless, flowerless, and reproduce by spores. To which plant group do ferns belong?

  Options: 
 A. Bryophyta
 B. Gymnosperm
 C. Angiosperm
 D. Pteridophyta
Answer: D