Which one of the following clasees in included under gymnosperms

Options

A. Cycadopsida
B. Pteropsida
C. Sphenopsida
D. Lycopsida.

Answer

**Step-by-Step Solution:**

1. **Understanding Gymnosperms**: Gymnosperms are a group of seed-producing plants that includes conifers, cycads, ginkgo, and gnetophytes. They are characterized by having seeds that are not enclosed in an ovary.

2. **Identifying the Classes**: The question asks which class is included under gymnosperms. The options provided include various classes, but we need to identify which one belongs to gymnosperms.

3. **Analyzing the Options**:
- **Cycapsida**: This class includes cycads, which are indeed gymnosperms. Therefore, this is a correct option.
- **Silopsida**: This class is part of pteridophytes, not gymnosperms. Example: Silotum.
- **Lycopsida**: This class also belongs to pteridophytes. Examples include Selaginella and Lycopodium.
- **Sphenopsida**: This class is another group of pteridophytes, with Equisetum as an example.
- **Pteropsida**: This class includes ferns, which are also pteridophytes.

4. **Conclusion**: Since Cycapsida is the only class listed that is included under gymnosperms, we can conclude that the correct answer is option 1, Cycapsida.

5. **Final Answer**: The class included under gymnosperms is **Cycapsida**.

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