Identify the correct sequence of plants in the order of characters given below:
a) Ovules borne along the ventral suture of unilocular ovary
b) Ovules are borne on central axis without septa
c) Ovules bome on the inner walls of ovary or on the intrusions of the wall that form incomplete partitions or false septa within the ovary

Options

A. Arachis, Dianthus, Cucurbita
B. Pea, Dianthus, Mustard
C. Primrose, China rose, Brassica
D. Helianthus, China rose, Brassica

Answer

To identify the correct sequence of plants based on the given characteristics of placentation, we can break down the characteristics as follows:

### Step 1: Analyze the Characteristics
1. **Characteristic A**: "Ovules borne along the ventral suture of unilocular ovary" - This refers to **Marginal placentation**. An example of this type of placentation is found in **Peas (Pisum sativum)**.

2. **Characteristic B**: "Ovules are borne on central axis without septa" - This describes **Free central placentation**. Examples of plants with this type of placentation include **Dianthus** and **Primrose**.

3. **Characteristic C**: "Ovules borne on the inner walls of ovary or on the intrusions of the wall that form incomplete partitions or false septa within the ovary" - This is known as **Parietal placentation**. A common example of this is found in **Mustard (Brassica)**.

### Step 2: Identify the Correct Sequence
Based on the analysis of the characteristics:
- **Characteristic A** corresponds to **Peas**.
- **Characteristic B** corresponds to **Dianthus** or **Primrose**.
- **Characteristic C** corresponds to **Mustard**.

Thus, the correct sequence of plants in the order of the given characteristics is:
1. **Peas (Marginal placentation)**
2. **Dianthus or Primrose (Free central placentation)**
3. **Mustard (Parietal placentation)**

### Final Answer
The correct sequence of plants based on the given characteristics is:
- **Peas → Dianthus or Primrose → Mustard**

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