Which of the following arrangements represents alignment of magnetic moments of Ferrimagnetic substance?

The correct answer is 1.

When there is spontaneous alignment of magnetic moments of domains in the same direction, we get ferromagnetism. These have a strong magnetic effect. This ordering of domains persists even when the magnetic field is removed and the ferromagnetic substance becomes a permanent magnet.

If the alignment of magnetic moments of domains is in a compensatory way so as to give zero net magnetic moment because of cancellation of the individual magnetic moments then we get anti-ferromagnetism in the material. The common example is MnO.

When the magnetic moments of domains are aligned in parallel and antiparallel directions in unequal numbers resulting in net magnetic moment, we get ferrimagnetism.

Hence,