One of the most dangerous radioactive pollutant to Homo sapiens is

Options

A. Strontium – 90
B. Phosphorus – 32
C. Sulphur – 35
D. None of the above

Explanation

To solve the question regarding the most dangerous radioactive pollutant to Homo sapiens, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Options**: The question provides four options: Strontium-90, Phosphorus-32, Sulphur-35, and None of the above.

2. **Understand the Nature of Radioactive Pollutants**: Radioactive pollutants are substances that emit radiation and can have harmful effects on human health. It is essential to consider how these substances interact with the human body.

3. **Analyze Each Option**:
- **Strontium-90**: This isotope is known for its similarity to calcium. It can be absorbed by the body, particularly in bones and teeth, leading to serious health issues such as cancer.
- **Phosphorus-32**: While it is radioactive, it does not have the same level of concern as Strontium-90 in terms of incorporation into human tissues.
- **Sulphur-35**: Similar to Phosphorus-32, it is less harmful compared to Strontium-90.
- **None of the above**: This option would imply that none of the listed isotopes are dangerous, which is incorrect.

4. **Determine the Most Dangerous Pollutant**: Based on the analysis, Strontium-90 poses the greatest risk due to its ability to mimic calcium and integrate into the skeletal system, leading to potential cancer development.

5. **Conclude the Answer**: Therefore, the most dangerous radioactive pollutant to Homo sapiens is **Strontium-90**.

### Final Answer:
The most dangerous radioactive pollutant to Homo sapiens is **Strontium-90**.

---