The relative permeability of a material A is slightly more than unity while that of a material B is slightly less than unity. Which of the following statement relating to the materials A and B is correct?

• A. Material A is diamagnetic and B paramagnetic.
• B. Both the materials A and B are ferromagnetic
• C. Both the materials A and B are paramagnetic
• D. Material A is paramagnetic and B diamagnetic