Tincture of iodine has antiseptic properties. This solution is made by dissolving

Options

A. iodine in potassium iodide
B. iodine in vaseline
C. iodine in water
D. iodine in alcohol

Explanation

To solve the question regarding tincture of iodine and its composition, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Tincture of Iodine**:
- Tincture of iodine is a solution that is known for its antiseptic properties. It is commonly used to disinfect wounds and prevent infections.

2. **Composition of Tincture of Iodine**:
- The tincture is made by dissolving elemental iodine in a solvent. The elemental iodine concentration in the solution typically ranges from 2% to 7%.

3. **Solvent Used**:
- The solvent used for dissolving iodine is a mixture of ethanol (alcohol) and water. This combination helps in the effective dissolution of iodine.

4. **Form of Iodine**:
- Elemental iodine can also be present in the form of iodide salts such as potassium iodide (KI) or sodium iodide (NaI), which can also contribute to the iodine content in the solution.

5. **Final Composition**:
- Therefore, the final composition of tincture of iodine is a solution of iodine dissolved in a mixture of ethanol and water.

6. **Conclusion**:
- The correct answer to the question is that tincture of iodine is made by dissolving iodine in a solution of alcohol (ethanol) and water.

### Answer:
Tincture of iodine is made by dissolving iodine in a solution of alcohol (ethanol) and water.