'Smack' is a drug obtained from:

The correct answer is Option (1) → Latex of Papaver somniferum

Smack is the common name of heroin, an opioid. Chemically it is diacetylmorphine. It is made by acetylation of morphine, and morphine is extracted from the latex of the opium poppy, Papaver somniferum.

(1) Latex of Papaver somniferum — Correct. This is the source of morphine, from which smack is made.

(2) Leaves of Cannabis sativa — Incorrect. Cannabis sativa gives the cannabinoids, such as marijuana, hashish, charas and ganja. These are a different group of drugs.

(3) Flowers of Datura — Incorrect. Datura is a plant with hallucinogenic properties. It is not the source of smack.

(4) Fruits of Erythroxylum coca — Incorrect. The coca plant is the source of the coca alkaloid, cocaine, which is a different drug from smack.

NCERT Extract:
Drugs and Alcohol Abuse – “Opioids are the drugs, which bind to specific opioid receptors present in our central nervous system and gastrointestinal tract. Heroin (Figure 7.7), commonly called smack is chemically diacetylmorphine which is a white, odourless, bitter crystalline compound. This is obtained by acetylation of morphine (Figure 7.7), which is extracted from the latex of poppy plant Papaver somniferum (Figure 7.8).”