Which of the following are the pioneer group to develop true roots and true leaves,

Explanation

Among the options given, the pioneer group to develop true roots and true leaves is Pteropsida.Pteropsida: This group includes ferns, which have true roots, stems, and leaves, making them the pioneers in developing all three structures.Therefore, Pteropsida is the correct option as it represents the group that has true roots and true leaves. Psilopsida lacks true roots and leaves, Sphenopsida has reduced and scale-like leaves, and Lycopsida has small and scale-like leaves as well.