Cocaine is obtained from

Options

A. Eythroxyion coca
B. Papaver somniferum
C. Atropa belladona
D. Datura stramonium.

Explanation

### Step-by-Step Solution:

1. **Understanding Cocaine**:
- Cocaine is a natural alkaloid that is commonly known by names such as "snow" or "coke". It is characterized as a bitter white crystalline powder.

2. **Source of Cocaine**:
- The primary source of cocaine is the leaves of the coca plant. The scientific name of this plant is *Erythroxylum coca*.

3. **Properties of Cocaine**:
- Cocaine acts as a powerful central nervous system (CNS) stimulant. This means it can induce feelings of euphoria and well-being while also delaying fatigue.
- Additionally, cocaine has vasoconstrictor properties, which means it can constrict blood vessels. This property allows it to be used in certain medical applications as an anesthetic.

4. **Elimination of Incorrect Options**:
- The question provides several options:
- *Papaver somniferum* is incorrect because it is the source of opium and opioids, not cocaine.
- *Atropa belladonna* is also incorrect; it is associated with compounds like atropine and not cocaine.
- *Datura stramonium* is incorrect as well; it is known for its psychoactive properties but does not produce cocaine.

5. **Conclusion**:
- Based on the information gathered, the correct answer to the question "Cocaine is obtained from" is *Erythroxylum coca*.

### Final Answer:
Cocaine is obtained from *Erythroxylum coca*.

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