Decline in hearing power begins after the age of

Options

A. 50 years
B. 35 years
C. 45 years
D. 10 years

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks at what age the decline in hearing power begins. The options provided are 50 years, 35 years, 45 years, and 10 years.

2. **Analyzing the Options**:
- **10 years**: This age is too young for a significant decline in hearing power.
- **35 years**: While some individuals may experience minor changes, it is generally not considered the average age for noticeable decline.
- **45 years**: Similar to 35 years, this age is still considered early for a significant decline in hearing.
- **50 years**: This is the age at which many individuals start to experience a noticeable decline in hearing ability.

3. **Understanding the Biological Basis**:
- Hearing is facilitated by the ear, specifically the organ of Corti located in the cochlea.
- The organ of Corti contains hair cells that are crucial for hearing.
- As individuals age, particularly after 50 years, these hair cells begin to degenerate, leading to a decrease in hearing power.

4. **Conclusion**: Based on the analysis, the decline in hearing power begins after the age of 50 years. Therefore, the correct answer is option 1 (50 years).

### Final Answer:
The decline in hearing power begins after the age of **50 years**.

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