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

**Step-by-Step Solution:**

1. **Understanding Rotenone**: Begin by identifying what Rotenone is. It is a naturally occurring compound that is primarily known for its use as an insecticide and piscicide (a substance used to kill fish).

2. **Source of Rotenone**: Next, determine the source from which Rotenone is obtained. It is important to note that Rotenone is derived from specific plants.

3. **Identifying the Correct Plant**: The primary plant known for producing Rotenone is *Derris elliptica*. This plant's roots contain the compound, making it the key source.

4. **Excluding Other Options**: In the context of the question, consider the other options provided:
- Leaves of Nicotiana (which produce nicotine)
- Leaves of Chrysanthemum (often used for decoration)
- Roots of Rauwolfia serpentina (known for its medicinal properties)
None of these options are correct sources of Rotenone.

5. **Conclusion**: Based on the information gathered, the correct answer to the question "Rotenone is obtained from" is *Derris elliptica*.

**Final Answer**: Rotenone is obtained from *Derris elliptica*.

---