Select incorrect pairing:

Options

A. Apocarpous - carpels free - lotus, rose
B. Syncarpous - carpels fused - mustard, tomato
C. Axile Placentation - lemon, tomato
D. Formation of false septum - mustard, Dianthus

Answer

To solve the question of identifying the incorrect pairing, we will analyze each option provided in the question step by step.

### Step-by-Step Solution:

1. **Understanding Apocarpus**:
- **Definition**: Apocarpus refers to flowers that have multiple carpels that are free from each other.
- **Examples**: The examples given are lotus and china rose (Hibiscus rosa-sinensis).
- **Conclusion**: This pairing is correct.

2. **Understanding Syncarpus**:
- **Definition**: Syncarpus refers to flowers where the carpels are fused together to form a single unit.
- **Examples**: Mustard (Brassica) and tomato (Solanum lycopersicum) are provided as examples.
- **Conclusion**: This pairing is also correct.

3. **Understanding Axial Placentation**:
- **Definition**: Axial placentation means that the ovules are arranged along a central axis of the ovary.
- **Examples**: The examples given are lemon, tomato, and orange.
- **Conclusion**: This pairing is correct.

4. **Understanding Formation of False Septum**:
- **Definition**: A false septum is formed in parietal placentation where ovules are attached to the inner walls of the ovary, creating the appearance of a septum.
- **Examples**: Mustard is correctly identified as having parietal placentation.
- **Incorrect Example**: Dianthus (often referred to as pinks) does not have parietal placentation; instead, it exhibits free central placentation.
- **Conclusion**: This pairing is incorrect.

### Final Answer:
The incorrect pairing is the last option: **Formation of false septum in mustard and dianthus**. Dianthus does not show parietal placentation; it shows free central placentation.

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