In pteridophyta, reduction division occurs when :-

Options

A. Prothallus is formed
B. Sex organs are formed
C. Spores are formed
D. Gametes are formed

Answer

To answer the question "In pteridophyta, reduction division occurs when:", we need to understand the life cycle of pteridophytes and the role of reduction division (meiosis) in it.

### Step-by-Step Solution:

1. **Understanding Pteridophyta**:
- Pteridophytes are a group of vascular plants that reproduce via spores. They have a dominant diploid generation known as the sporophyte.

2. **Identifying the Structures**:
- In the sporophyte, there are specialized structures called sporangia. These sporangia contain spore mother cells (also known as sporocytes).

3. **Reduction Division**:
- Reduction division, or meiosis, is the process by which diploid cells (2n) divide to form haploid cells (n). This is crucial for sexual reproduction in plants.

4. **When Does Meiosis Occur?**:
- In pteridophytes, meiosis occurs within the sporangia when the spore mother cells undergo reduction division to produce spores. The spores are haploid and will eventually develop into the gametophyte generation.

5. **Conclusion**:
- Therefore, the correct answer to the question is that reduction division occurs when **spores are formed** from the spore mother cells in the sporangium.

### Final Answer:
In pteridophyta, reduction division occurs when **spores are formed**.

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