Polychlorinated biphenyls (PCBs) are
I. non - carcinogenic in nature
II. Carcinogenic in nature
III. Used as cleansing solvent
Choose the correct options

Options

A. Both I and III
B. Both II and III
C. only II
D. only III

Answer

To solve the question regarding Polychlorinated Biphenyls (PCBs) and their characteristics, we need to analyze each statement provided in the question.

### Step-by-Step Solution:

1. **Understanding PCBs**:
- Polychlorinated biphenyls (PCBs) are organic chlorine compounds. They consist of two benzene rings connected by a carbon-carbon bond, with chlorine atoms substituted at various positions on the rings.

2. **Analyzing Statement I**:
- **Statement I**: "PCBs are non-carcinogenic in nature."
- **Evaluation**: This statement is incorrect. PCBs are known to be carcinogenic, meaning they can cause cancer in living organisms.

3. **Analyzing Statement II**:
- **Statement II**: "PCBs are carcinogenic in nature."
- **Evaluation**: This statement is correct. Research has shown that PCBs can cause cancer in animals and are considered a potential human carcinogen.

4. **Analyzing Statement III**:
- **Statement III**: "PCBs are used as a cleansing solvent."
- **Evaluation**: This statement is also correct. PCBs have been used in various applications, including as cleaning agents for electronic components and as plasticizers in paints.

5. **Conclusion**:
- Based on the evaluations:
- Statement I is incorrect.
- Statement II is correct.
- Statement III is correct.
- Therefore, the correct options are II and III.

### Final Answer:
The correct options are II and III.

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