Which of the following metal has maximum recommended level in drinking water ?

Options

A. Cadmium
B. Zinc
C. Aluminium
D. Iron.

Answer

To determine which metal has the maximum recommended level in drinking water, we will analyze the maximum levels of each of the given metals:

1. **Cadmium (Cd)**: The maximum recommended level in drinking water is **0.005 mg/L**.
2. **Zinc (Zn)**: The maximum recommended level in drinking water is **5 mg/L**.
3. **Aluminium (Al)**: The maximum recommended level in drinking water is **0.2 mg/L**.
4. **Iron (Fe)**: The maximum recommended level in drinking water is **0.3 mg/L**.

Now, we will compare these values to find the metal with the highest maximum recommended level:

- **Cadmium**: 0.005 mg/L
- **Zinc**: 5 mg/L
- **Aluminium**: 0.2 mg/L
- **Iron**: 0.3 mg/L

Among these values, **Zinc (Zn)** has the highest maximum recommended level at **5 mg/L**.

Therefore, the metal with the maximum recommended level in drinking water is **Zinc (Zn)**.

**Final Answer**: Zinc (Zn)

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