One chambered overy has ovules brone on a long placenta attached to wall in the region of ventral suture. It is

Options

A. Superficial
B. Basal
C. Marginal
D. Parietal

Answer

To solve the question regarding the type of placentation in a one-chambered ovary with ovules borne on a long placenta attached to the wall in the region of the ventral suture, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Characteristics of the Ovary**:
- The ovary is described as one-chambered (unilocular).
- The ovules are attached to a long placenta.

2. **Understand the Placenta Location**:
- The placenta is attached to the wall of the ovary specifically at the ventral suture. This is important for identifying the type of placentation.

3. **Define Types of Placentation**:
- **Marginal Placenta**: In this type, the placenta forms a ridge along the ventral suture of the ovary. It is typically seen in unilocular ovaries.
- **Superficial Placenta**: This occurs in multilocular ovaries where the placenta develops along the inner surface of the ovary.
- **Basal Placenta**: Found in bicarpillary syncarpous ovaries, where the placenta develops at the base.
- **Parietal Placenta**: Seen in multicarpillary syncarpous ovaries, where the placenta develops at the fusion of the carpels.

4. **Match the Description to the Types**:
- Given that the ovary is unilocular and the placenta is located at the ventral suture, this matches the definition of **marginal placentation**.

5. **Conclusion**:
- Based on the characteristics provided in the question, the type of placentation is **marginal placentation**.

### Final Answer:
The correct answer is **marginal placentation**.

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