Which of these is an example of marginal placentation ?

Options

A. Brinjal
B. Lemon
C. Pea
D. None of these

Answer

To determine which of the given options is an example of marginal placentation, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Marginal Placentation**:
- Marginal placentation occurs when the ovules are attached to a ridge along the ventral suture of a unilocular ovary. This means that the ovary has only one chamber (unilocular) and the ovules are arranged in two rows along this ridge.

2. **Identify Characteristics**:
- Look for plants that have a unilocular ovary.
- Check if the ovules are arranged along a ridge on the ventral side of the ovary.

3. **Examples of Plants**:
- Common examples of plants that exhibit marginal placentation include the pea plant (Pisum sativum), beans (Phaseolus), and other leguminous plants.

4. **Select the Correct Answer**:
- From the options provided, identify the plant that is known for marginal placentation. Based on the characteristics discussed, the pea plant is a classic example of marginal placentation.

5. **Conclusion**:
- Therefore, the answer to the question is the pea plant.

### Final Answer:
The example of marginal placentation is the **pea plant (Pisum sativum)**.

---