The correct option is A Pteridophytes
Seed is one of the most important aspects of the evolution of land plants. The understanding of the origin and evolution of the seed habit started in late Devonian times. The earlier seed plants or plants with seed-like structures were found to have existed in the Devonian seed ferns - Lyginopteris, an archetypal Pteridosperm. Pteridosperms are fossil plants which are considered to be intermediate between the Pteridophytes and seed-bearing plants. In pteridophytes mainly the seed habit has started to originate where after fertilization the zygote is retained inside the mother plant. Thus, the correct answer is option A.