Which of the following is an example of heterosporous pteridophyte ?

Options

A. Selaginella
B. Salvinia
C. Salvia
D. Both (A) and (B)

Answer

To solve the question of identifying an example of heterosporous pteridophytes, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Terms**:
- **Pteridophytes**: These are vascular plants that reproduce via spores and do not produce seeds. Common examples include ferns and horsetails.
- **Heterosporous**: This term refers to plants that produce two different types of spores: microspores (male) and megaspores (female).
- **Homospory**: This refers to the production of only one type of spore.

2. **Identify the Options**:
- The options given are:
- A) Slaginella
- B) Salvinia
- C) Salvia
- D) Both A and B

3. **Recall Examples of Heterosporous Pteridophytes**:
- It is known that certain genera of pteridophytes are heterosporous. The most commonly recognized examples are:
- **Salvinia**: A genus of aquatic ferns that produces both microspores and megaspores.
- **Selaginella**: A genus of clubmosses that also produces two types of spores.

4. **Evaluate Each Option**:
- **Slaginella**: This is a misspelling of Selaginella, which is indeed heterosporous.
- **Salvinia**: This is correctly identified as a heterosporous pteridophyte.
- **Salvia**: This is not a pteridophyte; it is a genus of flowering plants (sage) and does not fit the criteria.
- **Both A and B**: Since both Selaginella (misspelled as Slaginella) and Salvinia are heterosporous, this option is correct.

5. **Conclusion**:
- The correct answer is **D) Both A and B** (considering A as a misspelling of Selaginella).

### Final Answer:
The example of heterosporous pteridophytes is **D) Both A and B** (Selaginella and Salvinia).