In all the following the gynoecium is unilocular with multiple ovules except

Options

A. Trifolium
B. Lupin
C. Seabania
D. Petunia

Answer

To solve the question, we need to analyze the characteristics of the gynoecium in the given plant options and identify which one does not have a unilocular structure with multiple ovules.

### Step-by-Step Solution:

1. **Understand Gynoecium Structure**:
- Gynoecium refers to the female reproductive part of a flower, which consists of one or more carpels.
- A unilocular gynoecium means it has a single chamber, while multiple ovules indicate that there are several ovules present within that chamber.

2. **Analyze the Options**:
- **Trifolium**: This plant belongs to the Fabaceae family. The gynoecium in Trifolium is unilocular with multiple ovules.
- **Lupinus (Lupine)**: Also part of the Fabaceae family, Lupinus has a unilocular gynoecium with multiple ovules.
- **Sibania**: This is another member of the Fabaceae family and similarly has a unilocular structure with multiple ovules.
- **Petunia**: Petunia belongs to the Solanaceae family. In Petunia, the gynoecium is bicarpellary (two carpels) and bilocular (two chambers), which means it does not fit the description of being unilocular.

3. **Conclusion**:
- The question asks for the exception where the gynoecium is not unilocular with multiple ovules.
- Since Petunia has a bicarpellary and bilocular gynoecium, it is the correct answer.

### Final Answer:
The correct option is **Petunia**.

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