Natural cannabinoids are obtained from:

The correct answer is Option (2) → Inflorescence of Cannabis plant

Cannabinoids are a group of chemicals that act on the cannabinoid receptors, which are present mainly in the brain. The natural cannabinoids come from the inflorescences of the plant Cannabis sativa. The flower tops, leaves and resin are used in different mixtures to make marijuana, hashish, charas and ganja. They affect the cardiovascular system of the body.

(1) Root of Cannabis plant — Incorrect. NCERT names the inflorescence as the source, not the root.

(2) Inflorescence of Cannabis plant — Correct. This is the source of the natural cannabinoids.

(3) Bark of Cannabis plant — Incorrect. The bark is not given as a source.

(4) Phloem of Cannabis plant — Incorrect. The phloem is not given as a source.

NCERT Extract:
Drugs and Alcohol Abuse – “… Cannabinoids are a group of chemicals (Figure 7.9), which interact with cannabinoid receptors present principally in the brain. Natural cannabinoids are obtained from the inflorescences of the plant Cannabis sativa (Figure 7.10).”