Cyanide solution is used in the extraction of

Options

A. Mg
B. Sn
C. Zn
D. Ag

Explanation

To solve the question regarding the extraction of metals using cyanide solution, we can break it down into the following steps:

### Step-by-Step Solution:

1. **Understanding Cyanide Solution**:
- Cyanide solution is a chemical solution that contains cyanide ions. It is commonly used in the extraction of certain metals from their ores.

2. **Identifying the Process**:
- The extraction process that utilizes cyanide solution is known as the **MacArthur-Forrest process**. This process is specifically designed for the extraction of precious metals.

3. **Metals Extracted**:
- The primary metals extracted using cyanide solution are **gold (Au)** and **silver (Ag)**. The cyanide solution helps in dissolving these metals from their respective ores.

4. **Chemical Reaction**:
- In the MacArthur-Forrest process, the metal ore (either gold or silver) is treated with a dilute solution of sodium cyanide (NaCN) or potassium cyanide (KCN). The metal ions form a complex with the cyanide ions, which allows for their extraction.

5. **Conclusion**:
- Therefore, the correct answer to the question "Cyanide solution is used in the extraction of" is **gold and silver**.

### Final Answer:
Cyanide solution is used in the extraction of **gold and silver**.

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