Which of the following is a radical seavenger .

Options

A. Sodium metabisulphite
B. BHA
C. BHT
D. Both (2) and (3)

Answer

To determine which of the following is a radical scavenger, we need to understand the concept of radical scavengers and their role in protecting cells from damage caused by free radicals.

### Step-by-Step Solution:

1. **Understanding Radical Scavengers**:
- Radical scavengers are substances that can neutralize free radicals, which are unstable molecules that can cause cellular damage.
- These scavengers act as antioxidants, helping to protect cells from oxidative stress.

2. **Identifying Common Radical Scavengers**:
- Some well-known radical scavengers include butylated hydroxy anisole (BHA) and butylated hydroxy toluene (BHT).
- Both BHA and BHT are synthetic antioxidants commonly used in food preservation and cosmetics.

3. **Analyzing the Options**:
- The question provides several options, including BHA, BHT, sodium metabisulfite, and possibly others.
- We need to evaluate each option to see if they are recognized as radical scavengers.

4. **Evaluating Sodium Metabisulfite**:
- Sodium metabisulfite is known to have antioxidant properties and is used in pharmaceuticals and as a disinfectant.
- However, it is not primarily classified as a radical scavenger like BHA or BHT.

5. **Conclusion**:
- Based on the definitions and properties of the substances discussed, the correct answer to the question "Which of the following is a radical scavenger?" is **BHA or BHT**.
- If only one option is provided, it is likely that the answer is **BHA** or **BHT** depending on the context of the question.

### Final Answer:
The radical scavenger among the given options is **BHA (butylated hydroxy anisole)** or **BHT (butylated hydroxy toluene)**.

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