Roots are used in vegetative propagation of

Options

A. Ginger
B. Chrysanthemum
C. Sweet Potato
D. Potato.

Answer

To determine which plant uses roots for vegetative propagation, we can analyze each option provided:

1. **Ginger**: Ginger propagates through rhizomes, which are underground stems, not roots. Therefore, ginger does not use roots for vegetative propagation.

2. **Chrysanthemum**: This plant is propagated through stem cuttings. Again, this method does not involve roots for propagation.

3. **Sweet Potato**: Sweet potatoes are known to propagate through their roots. They can produce new plants from the tuberous roots, making this option a strong candidate.

4. **Potato**: Potatoes propagate through tubers, specifically through the "eyes" of the tuber, which are actually modified stems. This means that potatoes do not use roots for propagation.

Based on the analysis of each option, the correct answer is:

**C. Sweet Potato**

### Step-by-Step Solution:
1. **Identify the method of propagation for each plant**: Look at how each plant reproduces vegetatively.
2. **Analyze each option**:
- Ginger uses rhizomes (stems).
- Chrysanthemum uses stem cuttings.
- Sweet potato uses roots.
- Potato uses tubers (modified stems).
3. **Determine which plant uses roots**: From the analysis, sweet potato is the only plant that propagates using its roots.
4. **Conclude with the correct answer**: The answer is sweet potato (C).