Which of them has highest frequency?

Options

A.
B.
C.
D.

Explanation

To determine which option has the highest frequency, we need to understand the concept of frequency first.

### Step-by-Step Solution:

1. **Understand Frequency**:
- Frequency is defined as the number of oscillations or cycles that occur in one second. It is measured in Hertz (Hz).

2. **Identify the Options**:
- We need to look at the options provided (1, 2, 3, and 4) and see if they indicate different frequencies or oscillation rates.

3. **Compare the Frequencies**:
- If the options are given in terms of frequency values (like 100 Hz, 200 Hz, etc.), we can directly compare these numbers.
- If the options are described in terms of sound waves or other contexts, we need to analyze which one corresponds to a higher frequency based on the context (e.g., pitch of sound, type of wave).

4. **Select the Highest Frequency**:
- After comparing the frequencies from the options, we can select the one that has the highest value.

5. **Conclusion**:
- Based on the analysis, we conclude that option 4 has the highest frequency.

### Final Answer:
- **Option 4 has the highest frequency.**