Which are correctly is matched

Options

A. Poling -refining of copper
B. Cupellation -refining of silver
C. Smelting- An oxidation process
D. Roasting- An oxidation process

Explanation

To determine which options are correctly matched in the question, we will analyze each option step by step.

### Step 1: Analyze Option 1 - Poling
- **Process Name**: Poling
- **Process Work**: Purification of copper
- **Explanation**: Poling is a process used in the purification of copper, specifically to remove impurities like cuprous oxide. Since the description states that it does refining of copper, this matches correctly.
- **Conclusion**: Option 1 is correctly matched.

### Step 2: Analyze Option 2 - Cupellation
- **Process Name**: Cupellation
- **Process Work**: Refining of silver
- **Explanation**: Cupellation is a refining process where precious metals like silver and gold are separated from base metals such as lead, zinc, and copper. The description indicates it does refining of silver, which is accurate.
- **Conclusion**: Option 2 is correctly matched.

### Step 3: Analyze Option 3 - Smelting
- **Process Name**: Smelting
- **Process Work**: Oxidation process
- **Explanation**: Smelting is a process used to extract metals from their oxides through reduction, not oxidation. The description incorrectly states it as an oxidation process.
- **Conclusion**: Option 3 is incorrectly matched.

### Step 4: Analyze Option 4 - Roasting
- **Process Name**: Roasting
- **Process Work**: Oxidation process
- **Explanation**: Roasting is a process where sulfide ores are converted into oxides, releasing sulfur. This is indeed an oxidation process, matching the description correctly.
- **Conclusion**: Option 4 is correctly matched.

### Final Conclusion:
- The correctly matched options are:
- Option 1 (Poling - Purification of copper)
- Option 2 (Cupellation - Refining of silver)
- Option 4 (Roasting - Oxidation process)
- Option 3 (Smelting - Oxidation process) is incorrectly matched.

### Summary of Correct Options:
- **Correct Options**: 1, 2, and 4
- **Incorrect Option**: 3