The correct option is D Pteridophytes
Pteridophytes are known as botanical snakes or snakes of the plant kingdom.
In animal kingdom, reptiles are thought to have evolved after amphibians. Snakes are the most popular example of a reptile. In that context, bryophytes are called botanical amphibians. Pteridophytes are called botanical snakes.
Another reason is that the leaves of the ferns resemble crawling snakes.