Which of the following is an example for subaerial stem modification ?

Options

A. Agave
B. Asparagus
C. Tridax
D. Oxalis

Answer

To determine which of the following is an example of subaerial stem modification, we need to analyze the options provided and understand the concept of subaerial stem modifications.

### Step-by-Step Solution:

1. **Understanding Subaerial Stem Modifications**:
- Subaerial stem modifications refer to adaptations of stems that grow partially above the ground. These adaptations help the plant in various ways, such as vegetative reproduction and survival in different environments.

2. **Identifying Types of Subaerial Modifications**:
- Common types of subaerial stem modifications include runners, stolons, and suckers. Among these, runners are characterized by long internodes that can develop roots and shoots.

3. **Analyzing the Options**:
- **Option A: Ajay** - This does not correspond to any known plant.
- **Option B: Asparagus** - Asparagus is primarily known for its edible shoots but does not exhibit subaerial stem modifications like runners.
- **Option C: Tridex** - Similar to asparagus, Tridex does not typically show subaerial stem modifications.
- **Option D: Oxalis** - Oxalis is known to produce runners, which are a type of subaerial stem modification.

4. **Conclusion**:
- Based on the analysis, **Oxalis** is the only plant among the options that demonstrates subaerial stem modification through the presence of runners. Therefore, the correct answer is **Option D: Oxalis**.

### Final Answer:
**The correct answer is Option D: Oxalis.**