The permanent magnet is made fron which one of the following substances?

Options

A. diamagnetic substance
B. Paramagnetic
C. Ferromagnetic
D. Electromagnetic

Explanation

To determine which substance is used to make permanent magnets, we need to analyze the properties of the given options.

### Step-by-Step Solution:

1. **Understanding Permanent Magnets**: Permanent magnets are materials that maintain a persistent magnetic field without the need for an external power source. They are characterized by high magnetization.

2. **Analyzing the Options**:
- **Option A: Diamagnetic Substance**:
- Diamagnetic materials have very weak magnetic properties and are repelled by magnetic fields. They do not retain magnetization when the external field is removed. Thus, they cannot be used to make permanent magnets.

- **Option B: Paramagnetic Substance**:
- Paramagnetic materials have a small, positive susceptibility to magnetic fields, meaning they can be weakly magnetized in the presence of an external field. However, they do not retain their magnetization once the external field is removed. Therefore, they are not suitable for permanent magnets.

- **Option C: Ferromagnetic Substance**:
- Ferromagnetic materials, such as iron, cobalt, and nickel, have a high susceptibility to magnetic fields and can retain their magnetization even after the external field is removed. This property makes them ideal for permanent magnets.

- **Option D: Electromagnetic Substance**:
- Electromagnetic substances refer to materials that become magnetic only when an electric current flows through them. They do not exhibit permanent magnetism once the current is turned off. Hence, they cannot be used to make permanent magnets.

3. **Conclusion**: Based on the analysis, the correct answer is **Option C: Ferromagnetic Substance**, as these materials exhibit high magnetization and can retain their magnetic properties.

### Final Answer:
The permanent magnet is made from **Ferromagnetic Substance** (Option C).