Multiple choice A drug from the roots of which of the following plants cure mental disorders? Rauwolfia Marigold Brassica Utricularia Reveal answer Fill a bubble to check yourself A Correct answer Explanation Rauwolfia serpentina roots contain reserpine, an alkaloid historically used to treat hypertension and certain mental disorders like schizophrenia. The drug works by depleting catecholamines and serotonin in the brain, producing a calming effect.