Quinine is obtained from

Options

A. Cinchona root
B. Bark of Cinchona stem
C. Cinchona stem
D. None of the above.

Answer

**Step-by-Step Solution:**

1. **Understanding Quinine**: Quinine is known as an anti-malarial drug, which means it is used to treat malaria, a disease caused by the Plasmodium protozoan.

2. **Identifying the Source**: The question asks where quinine is obtained from. It is important to know the natural source of this compound.

3. **Cinchona Tree**: Quinine is derived from the bark of the cinchona tree. The scientific name for this tree is Cinchona officinalis.

4. **Conclusion**: Therefore, the correct answer to the question "Quinine is obtained from" is the bark of the cinchona tree (Cinchona officinalis).

5. **Final Answer**: Option number 2, which refers to the bark of the cinchona tree, is the right answer.

---