From the given plants, how many are pteridophytes?
Selaginella, Dryopteris, Adiantum, pinus, salvinia, Ginkgo, Marchantia, Cycas

Options

A. 5
B. 3
C. 7
D. 4

Answer

To determine how many of the given plants are pteridophytes, we will analyze each plant in the list and classify them accordingly.

### Step-by-Step Solution:

1. **Identify the plants in the list:**
- Selaginella
- Dryopteris
- Adiantum
- Pinus
- Salvinia
- Ginkgo
- Marchantia
- Cycas

2. **Classify each plant:**
- **Selaginella**: This is a pteridophyte. It belongs to the class Lycopsida.
- **Dryopteris**: This is also a pteridophyte, classified under the class Pteropsida.
- **Adiantum**: Another pteridophyte, also in the class Pteropsida.
- **Pinus**: This is not a pteridophyte; it is a gymnosperm.
- **Salvinia**: This is a pteridophyte, classified under the class Polypodyopsida.
- **Ginkgo**: This is not a pteridophyte; it is a gymnosperm.
- **Marchantia**: This is not a pteridophyte; it is a bryophyte (liverwort).
- **Cycas**: This is not a pteridophyte; it is a gymnosperm.

3. **Count the pteridophytes:**
- From the classification:
- Selaginella: Pteridophyte
- Dryopteris: Pteridophyte
- Adiantum: Pteridophyte
- Salvinia: Pteridophyte
- Total pteridophytes = 4 (Selaginella, Dryopteris, Adiantum, Salvinia)

4. **Conclusion:**
- The total number of pteridophytes in the given list is **4**.

### Final Answer:
The number of pteridophytes from the given plants is **4**.

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