Three of the following four are alike in a certain way and so form a group. Which is the one that does not belong to that group ?

Options

A. Silver
B. Iron
C. Gold
D. Zinc

Answer

To solve the problem, we need to analyze the given options based on their properties. The options provided are:

1. Silver
2. Iron
3. Gold
4. Zinc

### Step 1: Identify the properties of each metal
- **Silver**: A metal that does not rust or corrode in atmospheric moisture.
- **Iron**: A metal that rusts when exposed to moisture.
- **Gold**: A metal that does not rust or corrode in atmospheric moisture.
- **Zinc**: A metal that does not rust or corrode in atmospheric moisture.

### Step 2: Group the metals based on their rusting properties
From the properties identified:
- **Non-rusting metals**: Silver, Gold, Zinc
- **Rusting metal**: Iron

### Step 3: Determine the odd one out
Since Silver, Gold, and Zinc do not rust when exposed to atmospheric moisture, they form a group. Iron, on the other hand, rusts when exposed to moisture, making it the odd one out.

### Conclusion
The metal that does not belong to the group is **Iron** (Option 2).

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