Rotenone is obtained from

Options

A. Leaves of Nicotiana
B. Roots of Derris elliptica
C. Leaves of Chrysanthemum cinerarifolium
D. Roots of Rouwolffia serpentina

Answer

To answer the question "Rotenone is obtained from," we will analyze the options provided and identify the correct source of rotenone.

### Step-by-Step Solution:

1. **Understanding Rotenone**:
- Rotenone is a colorless, odorless crystalline substance that is used as a broad-spectrum insecticide and pesticide. It is derived from various plants.

2. **Identifying the Source**:
- Rotenone is primarily obtained from the roots of certain plants, particularly those in the Fabaceae family.

3. **Analyzing the Options**:
- **Option A: Leaves of Nicotiana** - This is incorrect as Nicotiana (tobacco) does not produce rotenone.
- **Option B: Roots of Daris elliptica** - This is correct. Daris elliptica, also known as the tuba plant, is known to produce rotenone.
- **Option C: Leaves of Chrysanthemum cinerea folium** - This is incorrect as Chrysanthemum species do not produce rotenone.
- **Option D: Roots of Rauwolfia serpentina** - This is also incorrect as Rauwolfia serpentina is not a source of rotenone.

4. **Conclusion**:
- The correct answer is **Option B: Roots of Daris elliptica**.