Pteridophytes are a group of plants that include ferns and their allies. These plants reproduce via spores rather than seeds. The Pteridophytes are divided into various classes including Pteropsida, Lycopsida, Psilopsida, and Sphenopsida. Here's the correct match : Pteropsida (A) - Adiantum (III). Adiantum (maidenhair fern) is an example of a fern, which falls under the class Pteropsida. Lycopsida (B) - Selaginella (IV). Selaginella is an example of clubmoss, which falls under the class Lycopsida. Psilopsida (C) - Psilotum (I). Psilotum is an example of whisk ferns, which falls under the class Psilopsida. Sphenopsida (D) - Equisetum (II). Equisetum is an example of horsetail, which falls under the class Sphenopsida.