Match the pair

Options

A. LSD-Narcotic
B. Heroin-Psychotropic
C. Benzodiazepam-Pain killer
D. Amphetamine-Stimulant

Answer

To solve the question of matching the pairs related to drugs and their classifications, we will analyze each option step by step.

### Step-by-Step Solution:

1. **Identify the first pair: LSD and narcotic.**
- LSD (Lysergic acid diethylamide) is not a narcotic. It is classified as a hallucinogen and is often used in the treatment of mental disorders. Therefore, this pair is incorrect.

2. **Identify the second pair: Heroin and psychotropic drug.**
- Heroin is an opioid and acts as a depressant, which means it slows down bodily functions. It is not classified as a psychotropic drug, which typically refers to substances that affect mood, perception, or consciousness. Thus, this pair is also incorrect.

3. **Identify the third pair: Benzodiazepam and painkiller.**
- Benzodiazepines are primarily used to treat anxiety and insomnia. They are not classified as painkillers; instead, they provide relaxation and sedation. Therefore, this pair is incorrect as well.

4. **Identify the fourth pair: Amphetamine and stimulant.**
- Amphetamines are indeed stimulants. They increase alertness, attention, and energy by enhancing the activity of certain neurotransmitters in the brain. This pair is correct.

### Conclusion:
The correct match from the options provided is:
- **D: Amphetamine is a stimulant.**