In which plant division, plant are known as vascular cryptogams:
Correct option is A. Pteridophyta
Vasculature or presence of vascular tissues for conduction water and minerals and food in the form of Xylem and Phloem respectively evolved in Pteridophytes. The plants belonging to this group do not produce seeds, reproduction is by spores and formation of inconspicous reproductive structures, hence called cryptogams.
So, the correct answer is 'Pteridophyta'