Placentation is parietal in the ovary of

Options

A. A) Argemone
B. B) Mustard
C. C)Dianthus
D. D)1 & 2

Answer

### Step-by-Step Solution:

1. **Understanding Placentation**:
- Placentation refers to the arrangement of ovules within the ovary of a flowering plant. It is crucial to identify the type of placentation to answer the question correctly.

2. **Identifying Parietal Placentation**:
- Parietal placentation occurs when ovules are attached to the inner wall of the ovary. This type of placentation is commonly found in the Brassicaceae family (mustard family).

3. **Analyzing the Options**:
- **Option 1: Argemon**: This plant exhibits parietal placentation. Therefore, this option is correct.
- **Option 2: Mustard**: Mustard also shows parietal placentation, making this option correct as well.
- **Option 3: Dianthus**: This plant has free central placentation, where ovules are arranged on a central axis without a septum. Thus, this option is incorrect.

4. **Evaluating the Combined Options**:
- **Option 4: One and Two**: Since both Argemon and Mustard exhibit parietal placentation, this option is correct.

5. **Conclusion**:
- The correct answer is **Option D: One and Two** (Argemon and Mustard).