Isinglass in used for

Options

A. Production of Insulin
B. Feeding cattle, pig and poultry
C. Preparation of paints and varnishes
D. Clarificationof vinegar, wines and beer

Answer

### Step-by-Step Solution

1. **Understanding Isinglass**:
- Isinglass is a type of gelatin derived from the swim bladder of fish. It is a dry gelatinous substance.

2. **Identifying Uses of Isinglass**:
- Isinglass is primarily used for the clarification of beverages, particularly in the production of wine, vinegar, and beer. It helps in removing impurities and sediments from these liquids.

3. **Evaluating the Options**:
- **Production of Insulin**: Incorrect. Insulin is produced using microorganisms like Escherichia coli or Saccharomyces.
- **Feeding Cattle and Pigs**: Incorrect. Isinglass is not used as animal feed.
- **Preparation of Paints and Varnishes**: Incorrect. Isinglass is not used in making paints and varnishes.
- **Clarification of Vinegar and Wine**: Correct. This is the primary use of Isinglass.

4. **Conclusion**:
- The correct answer to the question "Isinglass is used for?" is the clarification of vinegar and wine.