The correct option is B Morphine - pain killer
Morphine is a very effective sedative and pain killer (analgesic) and is very useful in patients who have undergone surgery. Amphetamine is a central nervous system stimulant that affects chemicals in the brain and nerves that contribute to hyperactivity and impulse control. Benzodiazepines are used as tranquilisers to treat a range of conditions, including anxiety and insomnia. LSD is a psychedelic drug producing a range of psychologic effects.