Ground water does not get polluted by:

Options

A. Sewage
B. Fertilisers
C. Automobile exhaust
D. Oil spills

Answer

To determine which option does not pollute groundwater, let's analyze each option provided:

1. **Sewage**: Sewage consists of waste water and can contain harmful bacteria and chemicals. When sewage seeps into the ground, it can contaminate groundwater, making it polluted.

2. **Fertilizers**: Fertilizers, when used in agriculture, can leach into the soil and dissolve in water. This runoff can carry nitrates and phosphates into the groundwater, leading to pollution.

3. **Automobile Exhaust**: Automobile exhaust primarily contributes to air pollution. It consists of gases and particulates that are released into the atmosphere. While it affects air quality, it does not directly seep into the ground to pollute groundwater.

4. **Oil Spills**: Oil spills can occur on land or water and can seep into the soil, contaminating groundwater with harmful hydrocarbons.

From the analysis, we can conclude that:

- **Groundwater does not get polluted by Automobile Exhaust**.

### Step-by-Step Solution:
1. **Identify the options**: List the potential pollutants affecting groundwater.
2. **Analyze each option**:
- **Sewage**: Confirmed to pollute groundwater.
- **Fertilizers**: Confirmed to pollute groundwater.
- **Automobile Exhaust**: Confirmed not to pollute groundwater.
- **Oil Spills**: Confirmed to pollute groundwater.
3. **Determine the correct answer**: Based on the analysis, the option that does not pollute groundwater is Automobile Exhaust.