Which of the following is not a tranguilizer?

Options

A. Barbituric acid
B. Second
C. Luminal
D. Phenactin

Answer

To determine which of the following options is not a tranquilizer, we can analyze each option based on their classifications and functions.

### Step-by-Step Solution:

1. **Understanding Tranquilizers**:
- Tranquilizers are medications that help reduce anxiety and induce calmness. They are often classified as anti-depressants and can affect the central nervous system.

2. **Analyzing the Options**:
- **Option A: Barbic Uric Acid**:
- This is a derivative of barbituric acid and is known to act as a tranquilizer. It is used to reduce anxiety and has hypnotic properties.
- **Option B: Sequal (Seconal)**:
- Seconal is a barbiturate that is used as a sedative and tranquilizer. It is effective for treating anxiety and sleep disorders.
- **Option C: Luminal**:
- Luminal (phenobarbital) is another barbiturate that is used as a sedative and is classified as a tranquilizer.
- **Option D: Phenacetin**:
- Phenacetin is primarily a pain-relieving and fever-reducing agent. It is classified as an analgesic and antipyretic, not a tranquilizer.

3. **Conclusion**:
- Based on the analysis, the only option that does not belong to the category of tranquilizers is **Phenacetin**. Therefore, the correct answer is **Option D**.

### Final Answer:
**Phenacetin is not a tranquilizer.**

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