Dia-magnetic material:
- In dia-magnetic materials, the atoms or molecules have all their electron spins paired up, resulting in a net magnetic moment of zero.
- This means that when a dia-magnetic material is placed in an external magnetic field, it creates an induced magnetic field in the opposite direction, causing it to be weakly repelled by the external field.
- The magnetic moments of individual atoms or molecules cancel each other out, resulting in a net magnetic moment of zero.

Parra-magnetic material:
- In para-magnetic materials, the atoms or molecules have unpaired electron spins, resulting in a net magnetic moment.
- When a para-magnetic material is placed in an external magnetic field, the individual magnetic moments align with the field, causing the material to be weakly attracted to the field.
- The magnetic moments of individual atoms or molecules do not cancel each other out, resulting in a net magnetic moment.

Ferromagnetic material:
- In ferromagnetic materials, the atoms or molecules have permanent magnetic moments that are aligned in the same direction.
- When a ferromagnetic material is placed in an external magnetic field, the atomic magnetic moments align even more strongly with the field, causing the material to be strongly attracted to the field and become magnetized.
- The magnetic moments of individual atoms or molecules do not cancel each other out, resulting in a strong net magnetic moment.

Ferrimagnetic material:
- Ferrimagnetic materials are similar to ferromagnetic materials, but they have two or more different types of magnetic moments that are aligned in opposite directions.
- When a ferrimagnetic material is placed in an external magnetic field, the atomic magnetic moments partially align with the field, resulting in a net magnetic moment that is smaller than in ferromagnetic materials.
- The magnetic moments of different types of atoms or molecules partially cancel each other out, but not completely, resulting in a net magnetic moment.

Conclusion:
- Among the given options, the magnetic moment is zero in dia-magnetic materials.
- This is because in dia-magnetic materials, all the electron spins are paired up, resulting in the cancellation of magnetic moments at the atomic or molecular level.
- Therefore, dia-magnetic materials are weakly repelled by an external magnetic field and do not exhibit any significant magnetic properties.