Explanation:

Opium cultivation is permitted in the notified tracts in the states of Madhya Pradesh, Rajasthan and Uttar Pradesh. Opium poppy (Papaver somniferous) plant is the source of opium gum which contains several indispensable alkaloids such as morphine, codeine and thebaine. Morphine is the best analgesic in the world. In case of extreme and excruciating pain such as that of terminally ill cancer patients, nothing alleviates the suffering except morphine. Codeine is commonly used in manufacture of cough syrups.