The highest acidic solution has a pH of

Options

A. `14`
B. `7`
C. `1`
D. `0`

Explanation

To find the highest acidic solution in terms of pH, we need to understand the pH scale and its implications for acidity and basicity.

### Step-by-Step Solution:

1. **Understanding the pH Scale**: The pH scale ranges from 0 to 14.
- A pH of 7 is considered neutral (neither acidic nor basic).
- A pH less than 7 indicates an acidic solution.
- A pH greater than 7 indicates a basic (alkaline) solution.

2. **Identifying Acidic Solutions**:
- As we move from pH 7 to 0, the acidity of the solution increases.
- The lower the pH value, the stronger the acid.

3. **Determining the Highest Acidic Solution**:
- The highest acidic solution would be the one with the lowest possible pH value.
- Theoretically, the lowest pH value is 0, which corresponds to a very strong acid.

4. **Conclusion**: Therefore, the highest acidic solution has a pH of 0.

### Final Answer:
The highest acidic solution has a pH of **0**.