Cocaine is obtained from
Erythroxylon coca
Papaver somniferum
Atropa belladona
Datura stramonium
As we have already studied in Commonly Abused Drugs -
cocaine -
Coca alkaloid or cocaine is obtained from coca plant Erythroxylum coca, native to South America.
- wherein
It interferes with the transport of the neuro-transmitter dopamine.
Hence, the correct option is (a).