Children under the age of 5 can hear upto

Options

A. 25 Hz
B. 25k Hz
C. 20 Hz
D. 20 kHz

Explanation

To determine the range of hearing for children under the age of 5, we need to analyze the given options and understand the typical hearing range for humans, especially for young children.

### Step-by-Step Solution:

1. **Understanding the Hearing Range**:
- The human ear can generally hear sounds in the frequency range of 20 Hz to 20,000 Hz (20 kHz). This range can vary slightly based on age and individual differences.

2. **Identifying the Options**:
- The options provided are:
- 525 Hertz
- 25 kilo Hertz (25,000 Hz)
- 20 Hertz
- 20 kilo Hertz (20,000 Hz)

3. **Analyzing the Options**:
- The lowest frequency option is 20 Hertz, which is within the audible range.
- The highest frequency option is 25 kilo Hertz (25,000 Hz), which is above the typical upper limit of human hearing (20 kHz).
- The option of 20 kilo Hertz (20,000 Hz) is at the upper limit of the human hearing range.

4. **Conclusion**:
- Children under the age of 5 can hear sounds up to 25 kilo Hertz (25,000 Hz), as they typically have a wider hearing range compared to adults.

### Final Answer:
Children under the age of 5 can hear up to **25 kilo Hertz (25,000 Hz)**.

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