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Coca alkaloid or cocaine is obtained from:

1. Datura
2. Papaver somniferum
3. Atropa belladonna
4. Erythroxylum coca

Correct answer: Erythroxylum coca

Solution

Cocaine is a tropane alkaloid naturally found in the leaves of the coca plant. Erythroxylum coca is the recognized botanical source, whereas Datura, Papaver somniferum, and Atropa belladonna produce different alkaloids.

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