Ovary containing the false septum occurs in

Options

A. Primrose
B. Dianthus
C. Argemone
D. Pisum sativum

Answer

To solve the question "Ovary containing the false septum occurs in," we need to analyze the options provided and understand the concept of placentation in flowering plants.

### Step-by-Step Solution:

1. **Understand the Concept of Placentation**:
- Placentation refers to the arrangement of ovules within the ovary. Different types of placentation can lead to different structural formations within the ovary.

2. **Identify the Types of Placentation**:
- The question specifically mentions a "false septum," which is associated with parietal placentation. In parietal placentation, the ovules are attached to the walls of the ovary, and this can lead to the formation of a false septum.

3. **Analyze the Options**:
- **Primrose**: This plant exhibits central placentation, where ovules are attached at the center of the ovary. Therefore, it does not have a false septum.
- **Dianthus**: Similar to Primrose, Dianthus also shows central placentation, making it incorrect for this question.
- **Argimon**: This plant is known for parietal placentation. In this case, the ovary is initially unilocular but can develop a false septum due to the growth of the placenta, making it the correct answer.
- **Pisum sativum (Pea)**: This plant has marginal placentation, where ovules are attached along the margin of the ovary, thus it does not form a false septum.

4. **Conclusion**:
- Based on the analysis, the correct answer to the question is **Argimon**, as it is the only option that exhibits parietal placentation leading to the formation of a false septum.

### Final Answer:
**Argimon**