Which of the following is not a hallucinogen?

Options

A. LSD
B. Heroin
C. Charas
D. Marijuana

Answer

To determine which of the following substances is not a hallucinogen, we need to analyze each option provided:

1. **Understanding Hallucinogens**: Hallucinogens are substances that cause hallucinations, which are perceptions that occur without an external stimulus. Common examples include LSD, marijuana, and churus.

2. **Analyzing the Options**:
- **Option A: LSD** - This is a well-known hallucinogen that alters perception and can cause hallucinations.
- **Option B: Heroin** - This is an opioid drug primarily used for pain relief and does not cause hallucinations. Instead, it induces feelings of relaxation, pleasure, and contentment.
- **Option C: Churus** - This is another term for hashish or cannabis, which is known to have hallucinogenic properties.
- **Option D: Marijuana** - This is also a well-known hallucinogen that can cause altered states of consciousness and hallucinations.

3. **Conclusion**: Based on the analysis, the substance that is not a hallucinogen is **Option B: Heroin**.

### Step-by-Step Solution:
1. Define hallucinogens and their effects.
2. List the options provided (LSD, Heroin, Churus, Marijuana).
3. Identify which substances are hallucinogens:
- LSD: Hallucinogen
- Heroin: Not a hallucinogen (opioid)
- Churus: Hallucinogen
- Marijuana: Hallucinogen
4. Conclude that the correct answer is **Option B: Heroin**.