Give the composition of tincture of iodine.

Explanation

### Step-by-Step Solution:

1. **Definition of Tincture of Iodine**: Tincture of iodine is a solution that is commonly used as an antiseptic. It helps in preventing the growth of microorganisms and is applied to wounds.

2. **Composition**: The composition of tincture of iodine typically consists of:
- **Iodine**: The active antiseptic ingredient, usually present in a concentration of 2-3%.
- **Alcohol**: Acts as a solvent for iodine and helps in its antiseptic action. Ethanol is commonly used.
- **Water**: Used to dilute the solution and to create a mixture with alcohol.
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