Three of the following four materials are alike in a certain way and one is different. Find the odd one out.

Brass

The correct answer is Option (1) → Brass

Let's analyze the options:

• Brass → an alloy (mixture of copper and zinc)
• Iron → a pure metal
• Copper → a pure metal
• Silver → a pure metal

Odd one out: Brass (because it is an alloy, others are pure metals)