Which one of the following is a matching pair of a drug and its category?

Options

A. Amphetamines-stimulant
B. Lysergic acid dimethyl amide-narcotic
C. Heroin-psychotropic
D. Benzodiazepam-pain killer.

Explanation

To solve the question regarding the matching pair of a drug and its category, we will analyze each option one by one.

### Step-by-Step Solution:

1. **Identify the Drugs and Their Categories**:
- We have four drugs mentioned: Amphetamine, Lysergic Acid Diethylamide (LSD), Heroin, and Diazepam. We need to categorize each drug correctly.

2. **Analyze the First Option - Amphetamine**:
- **Amphetamine** is known to be a **stimulant**. It increases alertness, attention, and energy.
- **Conclusion**: This option is a correct match.

3. **Analyze the Second Option - Lysergic Acid Diethylamide (LSD)**:
- **LSD** is classified as a **hallucinogen**. It alters perception, mood, and various cognitive processes.
- **Conclusion**: This option is incorrectly matched as it is not a narcotic.

4. **Analyze the Third Option - Heroin**:
- **Heroin** is an **opioid** and acts as a depressant. It is not a stimulant and is primarily used for pain relief.
- **Conclusion**: This option is also incorrectly matched.

5. **Analyze the Fourth Option - Diazepam**:
- **Diazepam** is a **benzodiazepine** and is classified as a tranquilizer, used primarily for anxiety and muscle relaxation.
- **Conclusion**: This option is incorrectly matched as it is not a painkiller.

6. **Final Conclusion**:
- After analyzing all options, the only correct matching pair is **Amphetamine - Stimulant**.

### Answer:
The correct answer is **Option 1: Amphetamine - Stimulant**.

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