The magnetic permeability ' µ ' of a material characterizes the ability of the material to allow the formation of magnetic fields within itself. In the context of different types of magnetic materials, the relative magnetic permeability ( µr, which is the ratio of the magnetic permeability of the material to the magnetic permeability of free space µ0 ), is a crucial parameter in distinguishing among diamagnetic, paramagnetic, and ferromagnetic substances. For a paramagnetic substance, these materials are attracted by a magnet but do not retain magnetic properties when the external field is removed. Their magnetic dipoles tend to align with the magnetic field, thereby strengthening it. As a result, the relative magnetic permeability of a paramagnetic material is slightly greater than 1(µr>1). However, this effect is typically quite weak. Therefore, for the question about the magnetic permeability µ of a paramagnetic substance, the correct option is: Option A: µ>1 This is because paramagnetic substances slightly enhance the magnetic field within themselves due to their magnetizable nature, hence making their magnetic permeability greater than 1 , but not by a huge margin.