A magnet can induce magnetism in

Options

A. brass
B. aluminium
C. glass
D. iron

Explanation

### Step-by-Step Solution:

1. **Understanding Magnetism**:
- A magnet has the ability to attract certain materials. The materials that are attracted to magnets are known as magnetic materials.

2. **Identifying Magnetic vs Non-Magnetic Materials**:
- Magnetic materials include substances like iron, cobalt, and nickel. Non-magnetic materials include brass, aluminum, and glass.

3. **Induction of Magnetism**:
- A magnet can induce magnetism in materials that are magnetic. This means that when a magnetic material is placed in a magnetic field, it can become magnetized itself.

4. **Analyzing the Given Materials**:
- In the question, we have brass, aluminum, glass, and iron.
- Brass, aluminum, and glass are non-magnetic materials and will not be attracted to a magnet or become magnetized.

5. **Conclusion**:
- Iron is the only material listed that is magnetic. Therefore, a magnet can induce magnetism in iron.

### Final Answer:
A magnet can induce magnetism in **iron**.

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