Which of the following pairs correctly matches a drug with its category?

Amphetamines — Stimulant

(a) Amphetamines — Stimulant: Amphetamines are a class of drugs that stimulate the central nervous system. They increase the release of certain neurotransmitters in the brain, such as dopamine and norepinephrine, leading to increased alertness, energy, and focus. Amphetamines are commonly used to treat conditions like attention deficit hyperactivity disorder (ADHD) and narcolepsy. They are known for their stimulant properties and can enhance performance and endurance, which is why they may be abused by some individuals, including sportspersons seeking an advantage.

(b) Lysergic acid diethylamide — Narcotic: Lysergic acid diethylamide (LSD) is a hallucinogenic drug that belongs to a class of compounds called psychedelics. It produces profound alterations in perception, mood, and thought processes. However, it is not classified as a narcotic. Narcotics, also known as opioids, are drugs that primarily act as pain relievers and have sedative effects. Examples of narcotics include drugs like morphine, codeine, and heroin.

(c) Heroin — Psychotropic drug: Heroin is an opioid drug derived from morphine. It is a potent analgesic and sedative, but it is not classified as a psychotropic drug. Psychotropic drugs, also known as psychoactive drugs, are substances that affect the mind, mood, and behavior. They include drugs used to treat mental disorders like depression, anxiety, and psychosis, such as antidepressants, antipsychotics, and anxiolytics.

(d) Benzodiazepines — Pain killer: Benzodiazepines are a class of drugs that have sedative, anxiolytic (anti-anxiety), and muscle relaxant properties. They are commonly prescribed for the treatment of anxiety disorders, insomnia, and certain seizure disorders. While they can have some analgesic effects, benzodiazepines are not primarily used as pain killers. Pain killers, also known as analgesics, include drugs like opioids, nonsteroidal anti-inflammatory drugs (NSAIDs), and acetaminophen, which are specifically designed to relieve pain.

In summary, the correct matching pair is (a) Amphetamines — Stimulant, as amphetamines are known for their stimulant properties and ability to enhance alertness and energy. The other options do not accurately match the drug with its respective category.