Which of the following metal is a water pollutant and causes sterility in human being

Options

A. As
B. Mn
C. Mg
D. Hg

Answer

To solve the question "Which of the following metal is a water pollutant and causes sterility in human beings?" we will analyze the given options and determine which metal fits the criteria of being a water pollutant and causing sterility.

### Step-by-Step Solution:

1. **Identify the Metals in the Options**:
The options provided are:
- As (Arsenic)
- Mn (Manganese)
- Mg (Magnesium)
- Hg (Mercury)

2. **Understand the Properties of Each Metal**:
- **Arsenic (As)**: Known to be toxic and a water pollutant, but primarily associated with cancer and other health issues rather than sterility.
- **Manganese (Mn)**: Essential in small amounts but can be harmful in excess; not primarily linked to sterility.
- **Magnesium (Mg)**: An essential nutrient for humans; not a pollutant that causes sterility.
- **Mercury (Hg)**: A well-known water pollutant that can accumulate in the food chain (bio-magnification) and is linked to various health issues, including infertility.

3. **Link Mercury to Sterility**:
Research and studies indicate that mercury exposure, particularly through seafood consumption, can lead to increased levels of mercury in the blood, which is associated with infertility, especially in men.

4. **Conclusion**:
Based on the analysis, the metal that is a water pollutant and causes sterility in human beings is **Mercury (Hg)**.

### Final Answer:
The correct answer is **Hg (Mercury)**.

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