The leaves in pteridophyta may be `:`

Options

A. small
B. large
C. vascular
D. all of these

Answer

### Step-by-Step Solution:

1. **Understanding Pteridophyta**: Pteridophyta is a group of vascular plants that reproduce via spores and do not produce seeds. They include ferns, horsetails, and clubmosses.

2. **Types of Leaves in Pteridophyta**: The leaves in pteridophytes can vary in size and structure. They can be classified into two main types:
- **Microphylls**: These are small leaves that typically have a single vein and are found in some pteridophytes like Selaginella.
- **Macrophylls**: These are larger leaves that have multiple veins and are commonly found in ferns.

3. **Vascular Nature of Leaves**: The leaves of pteridophytes are vascular, meaning they contain vascular tissues (xylem and phloem) that facilitate the transport of water, nutrients, and food throughout the plant.

4. **Conclusion**: Since the leaves of pteridophytes can be small (microphylls), large (macrophylls), and are vascular in nature, we conclude that all options regarding the types of leaves in pteridophyta are correct.

5. **Final Answer**: Therefore, the correct answer is "All of these" (Option 4).