The Central Pollution Control Board has recommended zone-wise permissible ambient noise level for residential area during day and night time is

Options

A. 75 db & 70 db
B. 65 db & 55 db
C. 55 db & 45 db
D. 50 db & 40 db

Answer

To solve the question regarding the permissible ambient noise levels recommended by the Central Pollution Control Board (CPCB) for residential areas during day and night time, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Context**: The question pertains to the noise levels that are permissible in residential areas as per the guidelines set by the Central Pollution Control Board (CPCB) in India.

2. **Identify the Options Given**: The options provided in the question are:
- A) 75 dB and 70 dB
- B) 65 dB and 55 dB
- C) 55 dB and 45 dB
- D) 50 dB and 40 dB

3. **Recall the Recommended Noise Levels**: According to the CPCB:
- For residential areas, the permissible noise level is 55 dB during the daytime.
- At night, the permissible noise level is 45 dB.

4. **Match the Options with the Recommended Levels**:
- Compare the recommended levels (55 dB for daytime and 45 dB for nighttime) with the options provided.
- Option C (55 dB and 45 dB) matches the recommended levels for residential areas.

5. **Select the Correct Option**: Based on the comparison, the correct answer is option C: 55 dB during the daytime and 45 dB at night.

### Final Answer:
The Central Pollution Control Board has recommended the permissible ambient noise level for residential areas during daytime and nighttime as **55 dB and 45 dB** respectively (Option C).

---