Multiple choice Which of the following is not a correct match? Tranquillisers – Barbiturates Narcotics – Codeine, heroin Stimulants – Cocaine, caffeine Hallucinogens – Amphetamines Reveal answer Fill a bubble to check yourself D Correct answer Explanation Tranquilizers include barbiturates. Narcotics include codeine and heroin. Stimulants include cocaine and caffeine. Hallucinogens include LSD, psilocybin, and mescaline - NOT amphetamines, which are stimulants.