Which of the following is a pseudo solid?

Identify the incorrect set from the following:

Explain the magnetic properties of solids.

Given below are two statements.
Statement $I$ : $O_2, Cu^{2+}$ and $Fe^{3+}$ are weakly attracted by magnetic field and are magnetized in the same direction as magnetic field.
Statement $II$ : $NaCl$ and $H_2O$ are weakly magnetized in opposite direction to magnetic field.
In the light of the above statements,choose the most appropriate answer from the options given below:

What is the order of arrangement of constituent particles in a crystalline solid?

Which of the following is a primitive unit cell?