How many plants in the given list show axile placentation?
Pea, Mustard, Dianthus, Tomato, Argemone, Chinarose, Prim rose, Lemon, Sunflower.

Options

A. Two
B. Three
C. Five
D. Six

Answer

To determine how many plants from the given list exhibit axile placentation, we will analyze each plant one by one based on their known placentation types.

### Step-by-Step Solution:

1. **Understand Axile Placentation**:
- Axile placentation occurs when the ovules are attached to the central axis of the ovary, and the ovary is divided into two or more locules.

2. **List of Plants**:
- The plants provided are: Pea, Mustard, Dianthus, Tomato, Argemone, Chinarose, Primrose, Lemon, and Sunflower.

3. **Identify the Placentation of Each Plant**:
- **Pea**: Shows marginal placentation.
- **Mustard**: Shows parietal placentation.
- **Dianthus**: Shows free central placentation.
- **Tomato**: Shows axile placentation.
- **Argemone**: Shows parietal placentation.
- **Chinarose**: Shows axile placentation.
- **Primrose**: Shows free central placentation.
- **Lemon**: Shows axile placentation.
- **Sunflower**: Shows basal placentation.

4. **Count the Plants with Axile Placentation**:
- From the analysis, the plants that show axile placentation are:
- Tomato
- Chinarose
- Lemon
- Thus, there are **three plants** that exhibit axile placentation.

5. **Final Answer**:
- The total number of plants in the list that show axile placentation is **3**.