Which of the following metals is /are toxic and pollutants ?
A) Cadmium
B) Lead
C) Mercury
D) Zinc

Options

A. C,D
B. A,B
C. B,C,D
D. A,B,C

Answer

To determine which of the following metals are toxic and pollutants, we will analyze each option provided in the question: Cadmium, Lead, Mercury, and Zinc.

### Step 1: Analyze Cadmium
- **Toxicity**: Cadmium is highly toxic and can cause severe health issues.
- **Health Effects**: Exposure to cadmium can lead to cancer, cardiovascular problems, neurological disturbances, respiratory issues, and reproductive harm.
- **Conclusion**: Cadmium is a toxic pollutant.

### Step 2: Analyze Lead
- **Toxicity**: Lead is known to be a cumulative toxicant.
- **Health Effects**: It accumulates in the body, particularly in bones, kidneys, and liver. Lead poisoning can lead to serious health problems, especially when it contaminates drinking water through lead pipes.
- **Conclusion**: Lead is a toxic pollutant.

### Step 3: Analyze Mercury
- **Toxicity**: Mercury is also highly toxic.
- **Health Effects**: It can harm the nervous system, digestive system, immune system, lungs, and kidneys. Mercury is corrosive and can cause significant damage to the skin and eyes. Young children are particularly vulnerable to its effects.
- **Conclusion**: Mercury is a toxic pollutant.

### Step 4: Analyze Zinc
- **Toxicity**: Zinc is an essential trace element required by the body.
- **Health Effects**: The recommended daily intake is around 8 mg for women and 11 mg for men. In normal doses, zinc is not harmful and does not exhibit toxic properties.
- **Conclusion**: Zinc is not considered a toxic pollutant.

### Final Answer
Based on the analysis, the metals that are toxic and pollutants are:
- A) Cadmium
- B) Lead
- C) Mercury

Thus, the correct answer is **A, B, and C**.

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