Orford process is used in extraction of

Options

A. Fe
B. Co
C. Pt
D. Ni

Explanation

To solve the question regarding the Orford process, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Orford Process**: The Orford process is a method used for the extraction of certain metals through electrolytic refining. It specifically targets the purification of metals from their ores.

2. **Identify the Metal**: The Orford process is primarily used for the extraction of nickel. It involves the electrolytic refining of nickel from its ores or concentrates.

3. **Review the Options**: The question provides several options:
- Option 1: Iron (Fe)
- Option 2: Cobalt
- Option 3: Platinum
- Option 4: Nickel

4. **Select the Correct Answer**: Since the Orford process is specifically used for the extraction of nickel, the correct answer is:
- **Option 4: Nickel**

### Final Answer:
The Orford process is used in the extraction of **Nickel**.

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