## Core Concept
The acceptable noise level in hospital wards is crucial for patient comfort and recovery. Prolonged exposure to high noise levels can lead to stress, sleep disturbances, and other adverse health effects. The World Health Organization (WHO) and other health authorities provide guidelines for noise levels in healthcare settings.

## Why the Correct Answer is Right
The correct answer, , is based on guidelines that recommend hospital wards should maintain noise levels below 35 decibels to ensure a quiet and restful environment for patients. This level helps in minimizing disruptions and promoting healing. Noise levels in hospitals can be controlled through various means, including architectural design, noise-reducing materials, and policies limiting unnecessary noise.

## Why Each Wrong Option is Incorrect
* **Option A:** is too high for a hospital setting, as it exceeds the recommended level for patient rooms and can lead to significant sleep disturbance and stress.
* **Option B:** might seem reasonable but is still higher than the recommended level for ensuring a quiet environment conducive to rest and recovery.
* **Option D:** is lower than necessary; while quieter environments are beneficial, extremely low noise levels might not be practical or necessary for all hospital areas.

## Clinical Pearl / High-Yield Fact
A key point to remember is that noise levels in hospital wards should ideally not exceed 35 decibels, aligning with recommendations for a healing environment. Implementing noise reduction strategies can significantly impact patient satisfaction and outcomes.

**Correct Answer: C. 35.**