Which of the following are not used as food preservatives ?

Options

A. Table salt
B. Sodium hydrogencarbonate
C. Cane sugar
D. Benzoic acid

Explanation

To determine which substances are not used as food preservatives, we first need to understand what food preservatives are and their common types. Food preservatives are substances added to food to prevent spoilage, extend shelf life, and maintain nutritional quality. They can be classified into two main categories: natural and synthetic preservatives.

### Step-by-Step Solution:

1. **Identify Common Food Preservatives**:
- Common natural preservatives include salt, sugar, vinegar, and certain spices.
- Common synthetic preservatives include sodium benzoate, potassium sorbate, and sulfites.

2. **Review the Options Provided**:
- If a list of substances is given, we need to analyze each one to see if it is commonly recognized as a food preservative.

3. **Eliminate Known Preservatives**:
- Go through each option and eliminate those that are widely recognized as food preservatives.

4. **Identify Non-Preservatives**:
- The remaining substances after elimination will be the ones that are not used as food preservatives.

5. **Conclusion**:
- Summarize which substances from the options provided are not used as food preservatives.

### Example Analysis (Hypothetical Options):
- **Option A: Sodium Benzoate** - Known preservative.
- **Option B: Sugar** - Natural preservative.
- **Option C: Vinegar** - Natural preservative.
- **Option D: Artificial Colorants** - Not a preservative.

### Final Answer:
Based on the analysis, the substances that are not used as food preservatives would be those like artificial colorants or any other option that does not fit the definition of a preservative.

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