Which of the following is an example of the type of parietal placentation given below ?

Options

A. Dianthus and Primrose
B. Sunflower and Marigold
C. Tomato and Lemon
D. Argemone and Mustard

Answer

To solve the question regarding examples of parietal placentation, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of Placentation**:
- Placentation refers to the arrangement of ovules within the ovary of a flower. Different types of placentation include marginal, axile, parietal, free central, and basal.

2. **Identify Parietal Placentation**:
- In parietal placentation, the ovary is typically unilocular (having one chamber), and the ovules are attached to the inner wall of the ovary (the periphery) rather than being centrally located. The ovary may appear to be divided by a false septum known as a replum.

3. **Examples of Parietal Placentation**:
- Common examples of plants exhibiting parietal placentation include mustard (Brassica) and argemone. These plants have their ovules arranged along the inner walls of the ovary.

4. **Select the Correct Answer**:
- Based on the understanding that mustard and argemone are examples of parietal placentation, we can conclude that the correct answer to the question is option four, which lists mustard and argemone.

### Final Answer:
- The correct answer is **Mustard and Argemone** (Option 4).

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