Which of the following options correctly identifies artificial and natural methods of vegetative propagation ?

Options

A. rose and sugarcane
B. lemon and orange
C. Begonia and Bryophyllum
D. all of these

Explanation

To solve the question regarding the identification of artificial and natural methods of vegetative propagation, we will analyze the given options step by step.

### Step-by-Step Solution:

1. **Understanding Vegetative Propagation**:
- Vegetative propagation is a form of asexual reproduction in plants where new individuals arise from vegetative parts such as stems, roots, and leaves.
- It can be categorized into two methods: artificial and natural.

2. **Identifying Artificial Methods**:
- Artificial methods involve human intervention. Examples include:
- **Layering**: This technique involves bending a stem to the ground and covering part of it with soil, allowing roots to develop while still attached to the parent plant.

3. **Identifying Natural Methods**:
- Natural methods occur without human intervention. Examples include:
- **Bulb formation**: This is a natural method where multicellular fleshy buds (bulbs) develop into new plants.

4. **Analyzing the Options**:
- **Option A: Rose and Sugarcane**:
- Both can propagate through stem cuttings (artificial method) but do not represent a clear distinction between artificial and natural methods.
- **Option B: Lemon and Orange**:
- Lemon and orange trees can be propagated through layering (artificial) and also naturally through seeds or budding.
- **Option C: Begonia and Bryophyllum**:
- Begonia can propagate through rhizomes (natural), and Bryophyllum can propagate through notches on leaves (natural).
- **Option D: All of these**:
- This option suggests that all previous options correctly identify artificial and natural methods, which is not accurate.

5. **Conclusion**:
- After analyzing all options, **Option B (Lemon and Orange)** is the correct answer as it correctly identifies both artificial (layering) and natural (seed propagation) methods of vegetative propagation.

### Final Answer:
The correct option that identifies artificial and natural methods of vegetative propagation is **Option B: Lemon and Orange**.