Which of the following is not a pteridophyte

Options

A. (a) Ginkgo
B. (b) Selaginella
C. (c) Polypodium
D. (d) Azolla

Answer

To determine which of the following options is not a pteridophyte, we need to understand the characteristics of pteridophytes and compare them with the given options.

### Step-by-Step Solution:

1. **Understanding Pteridophytes**:
- Pteridophytes are vascular plants that do not produce seeds.
- They reproduce via spores and include ferns, horsetails, and clubmosses.
- They possess xylem and phloem, making them tracheophytes (vascular plants).

2. **Analyzing the Options**:
- **Option A: Ginkgo**:
- Ginkgo is classified as a gymnosperm, which means it produces seeds.
- It is known as a "living fossil" and does not fall under the category of pteridophytes.
- **Option B: Selaginella**:
- Selaginella is an advanced type of pteridophyte and reproduces via spores.
- **Option C: Polypodium**:
- Polypodium is a type of fern, which is a classic example of a pteridophyte.
- **Option D: Azolla**:
- Azolla is also a fern and is known for its role in nitrogen fixation, thus it is a pteridophyte.

3. **Conclusion**:
- Among the given options, Ginkgo is the only one that does not belong to the pteridophyte category. Therefore, the answer is **Option A: Ginkgo**.

### Final Answer:
**Ginkgo is not a pteridophyte.**

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