Which of the following is not correct?
1. Axile-Primrose
2. Parietal-Mustard,Argemone
3. free central-Dianthus
4.Basal-sunflower,Marigold

Answer

To determine which of the given statements about placentation is incorrect, we will analyze each option step by step.

### Step 1: Understand the concept of placentation
Placentation refers to the arrangement of ovules within the ovary of a flower. There are several types of placentation, including axile, parietal, free central, and basal.

### Step 2: Analyze each option
1. **Axile - Primrose**:
- Axile placentation occurs when ovules are attached to a central column (axis) within the ovary.
- However, Primrose actually exhibits free central placentation, not axile.
- **Conclusion**: This statement is incorrect.

2. **Parietal - Mustard, Argemone**:
- Parietal placentation occurs when ovules are attached to the walls of the ovary.
- Mustard and Argemone are known to have parietal placentation.
- **Conclusion**: This statement is correct.

3. **Free Central - Dianthus**:
- Free central placentation occurs when ovules are attached to a central column but not separated by septa.
- Dianthus is known to exhibit free central placentation.
- **Conclusion**: This statement is correct.

4. **Basal - Sunflower, Marigold**:
- Basal placentation occurs when ovules are attached at the base of the ovary.
- Sunflower and Marigold are known to have basal placentation.
- **Conclusion**: This statement is correct.

### Step 3: Identify the incorrect statement
From our analysis, the only incorrect statement is the first one: "Axile - Primrose." Therefore, the answer to the question is:

**Answer**: 1. Axile - Primrose

---