Which one of these can be called potable water?

Options

A. Grey-colored water
B. Pungent smelling water
C. Turbid and odorless water
D. Transparent and odorless water

Explanation

**Step-by-Step Solution:**

1. **Understand the Definition of Potable Water:**
- Potable water is defined as water that is suitable for drinking. It must meet certain criteria to ensure it is safe for human consumption.

2. **Identify the Characteristics of Potable Water:**
- Potable water should be:
- **Colorless and Transparent:** It should not have any color or turbidity.
- **Tasteless:** It should not have any additional taste.
- **Odorless:** There should be no smell at all.
- **Free from Impurities:** It should not contain any pollutants or microbes.
- **Contain Optimum Minerals:** The mineral content should be in an appropriate concentration—not too high or too low.

3. **Evaluate the Given Options:**
- **Option a: Gray colored water**
- This is not potable because it is colored and not transparent.
- **Option b: Pungent smelling water**
- This is not potable because it has a smell, while potable water should be odorless.
- **Option c: Turbid and odourless water**
- This is not potable because it is turbid (cloudy), while potable water should be clear and transparent.
- **Option d: Transparent and odourless water**
- This meets all the criteria for potable water as it is clear and has no smell.

4. **Conclusion:**
- The correct answer is **Option d: Transparent and odourless water**, as it fulfills all the requirements for potable water.