What is tincture of lodine? Write its one use

Explanation

### Step-by-Step Solution:

1. **Definition of Tincture of Iodine**:
- Tincture of iodine is a solution that contains 2-7% elemental iodine.
- It is prepared by dissolving iodine in a mixture of ethanol (alcohol) and water, with the presence of potassium iodide and sodium iodide to enhance the solubility of iodine.

2. **Composition**:
- The main components of tincture of iodine are:
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