To answer the question regarding the sporophytic plant body in pteridophytes, we can break down the information step by step.
### Step-by-Step Solution:
1. **Understanding Pteridophytes**:
- Pteridophytes are a group of vascular plants that reproduce via spores and do not produce seeds. Common examples include ferns and horsetails.
2. **Sporophyte Dominance**:
- In pteridophytes, the dominant phase of the life cycle is the sporophyte generation. This means that the sporophyte is the main plant body that we observe.
3. **Differentiation of the Sporophyte**:
- The sporophytic plant body in pteridophytes is well-differentiated into three main structures: roots, stems, and leaves. This differentiation allows the plant to perform various functions such as anchorage, support, and photosynthesis.
4. **Presence of Sporangia**:
- In addition to roots, stems, and leaves, the sporophyte also bears sporangia. Sporangia are specialized structures where spores are produced through meiosis.
5. **Vascular Tissue**:
- Pteridophytes possess vascular tissues (xylem and phloem) that are more advanced than those found in non-vascular plants like bryophytes. However, they are not considered the most advanced vascular tissues compared to those found in angiosperms (flowering plants).
6. **Evaluating the Options**:
- The first option states that the sporophytic plant body is differentiated into root, stem, leaf with gametangia. This is incorrect because gametangia are structures associated with the gametophyte generation, not the sporophyte.
- The second option states that the sporophyte is differentiated into root, stem, leaf, and bears sporangia. This is correct.
- The third option claims that the sporophyte is deployed with the most advanced vascular tissue, which is misleading as pteridophytes have vascular tissue but are not the most advanced.
7. **Conclusion**:
- Therefore, the correct answer to the question is that the sporophytic plant body in pteridophytes is differentiated into root, stem, leaf, and bears sporangia.
### Final Answer:
The correct option is that the sporophytic plant body in pteridophytes is differentiated into root, stem, leaf, and bears sporangia.
