Select the mismatch `:`

Options

A. Pinu-Dioecious
B. Cycas-Dioecious
C. Salvinia-Heterosporous
D. Equisetum-Homosporous

Answer

To solve the question of selecting the mismatch, we need to analyze each option provided in the question and determine whether they correctly represent the characteristics of the plant groups mentioned.

### Step-by-Step Solution:

1. **Identify the Plant Groups**: The question involves Gymnosperms and Pteridophytes. We need to check the examples given for each group.

2. **Examine the First Option - Pinus**:
- Pinus is a Gymnosperm.
- Gymnosperms are known for having naked seeds and can be monoecious (male and female reproductive structures on the same individual) or dioecious (male and female reproductive structures on different individuals).
- Pinus is monoecious, meaning it does not have separate male and female trees. Therefore, this option is a mismatch if it is stated as dioecious.

3. **Examine the Second Option - Cycus**:
- Cycus is also a Gymnosperm.
- Cycus is dioecious, meaning it has separate male and female trees.
- This option correctly matches the characteristic of being dioecious.

4. **Examine the Third Option - Salvinia**:
- Salvinia is a Pteridophyte.
- Salvinia is heterosporous, meaning it produces two different types of spores (male and female).
- This option correctly matches the characteristic of being heterosporous.

5. **Examine the Fourth Option - Equisitum**:
- Equisitum is also a Pteridophyte.
- Equisitum is homosporous, meaning it produces only one type of spore.
- This option correctly matches the characteristic of being homosporous.

6. **Conclusion**:
- The mismatch is the first option, Pinus, as it is incorrectly associated with being dioecious when it is actually monoecious.

### Final Answer:
The mismatch is **Pinus**, as it is monoecious, not dioecious.

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