Select the mismatch:

Options

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

Answer

To solve the question of selecting the mismatch from the given options, we will analyze each option step by step.

### Step 1: Analyze the first option - Pinus is Diocious.
- **Explanation**: Pinus is a genus of gymnosperms. Gymnosperms are known to have both male and female reproductive structures on the same plant. Therefore, Pinus is considered bisexual, not dioecious. Dioecious plants have male and female reproductive structures on separate plants.
- **Conclusion**: This option is incorrect (mismatched).

### Step 2: Analyze the second option - Cycus is Diocious.
- **Explanation**: Cycus is indeed a dioecious plant, meaning that it has male and female reproductive structures on different plants. This is a correct statement.
- **Conclusion**: This option is correct.

### Step 3: Analyze the third option - Salvina is heterosporous.
- **Explanation**: Salvina (also known as Salvinia) is a type of aquatic fern that produces two types of spores: microspores and megaspores. This characteristic defines it as heterosporous.
- **Conclusion**: This option is correct.

### Step 4: Analyze the fourth option - Iquicetum is Homo sporous.
- **Explanation**: Iquicetum (likely referring to Equisetum, the horsetail plant) produces only one type of spore, which makes it homosporous. This statement is accurate.
- **Conclusion**: This option is correct.

### Final Conclusion:
After analyzing all the options, we find that the first option, stating "Pinus is Diocious," is the only mismatched statement. Therefore, the answer to the question is:

**Mismatched Option: 1 (Pinus is Diocious)**

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