Which of the following elements is used for tinning ?

Options

A. Iron
B. Tin
C. Copper
D. Aluminium

Explanation

**Step-by-Step Solution:**

1. **Understand the Process of Tinning:**
- Tinning is a process where an article is coated with a layer of tin. This is done to protect the underlying metal from corrosion.

2. **Identify the Purpose of Tinning:**
- The main purpose of tinning is to prevent metals from reacting with air and moisture, which can lead to the formation of an oxide layer and corrosion.

3. **Review the Options Given:**
- The question presents multiple options for the element used in the tinning process. We need to evaluate each option.

4. **Evaluate Each Option:**
- **Option 1: Iron** - Iron is not used for tinning. It is a metal that can corrode if not protected.
- **Option 2: Tin** - Tin is indeed used in the tinning process. It is the element that coats other metals to protect them.
- **Option 3: Copper** - Copper is not used for tinning. It can also corrode and is not the coating material.
- **Option 4: Aluminum** - Aluminum is not used for tinning either, as it does not serve the purpose of coating.

5. **Select the Correct Answer:**
- After evaluating all the options, the correct answer is **Option 2: Tin**.

**Final Answer:**
The element used for tinning is **Tin**.

---