The correct option is
C Morphine
Drugs are chemical substances which cause various biological (physical and psychological) changes when administered into an organism’s body.
Some drugs may be prescribed by doctors in measured doses. But there are certain drugs which are illegal for their potential adverse effects on the body.
Both prescribed and illicit drugs can be misused for the perceived benefits of euphoria, well-being, escape from reality etc.
Morphine is a drug derived from opium (a drug derived from poppy seeds) that can act as a sedative and analgesic (pain killer). It is a white crystalline powder with bitter taste and is used in medicines to dull pain and for sedation (inducing sleep). Regular use of morphine can induce addiction.
Morphine numbs the nervous system to reduce the sensation of any kind of pain and is used in case of surgeries, injuries, fractures and burns to reduce pain and induce sleep of the patient/victim.
Heroin is also an opioid (drug derived from opium) which is prepared by acetylation (introduction of acetyl group) of morphine. It is much stronger than morphine and induces drowsiness and lethargy.
Cocaine is a coca alkaloid obtained from the coca plant Erythroxylum coca. Cocaine acts as a stimulant of the central nervous system. It increases mental alertness and physical strength.
Hallucinogens like LSD or lysergic acid diethylamide are responsible for hallucinations. Hallucination is a sensory perception that occurs in the absence of an actual stimulus and usually arises from neurological disturbances in response to hallucinogenic drugs.