Relative permittivity and permeability of a material are ${ϵ}_r$ and ${\mu }_r$. Which values are allowed for a diamagnetic material?

1. Relative permittivity ${ϵ}_r$ for any material is $\ge 1$.2. For diamagnetic materials, the magnetic susceptibility ${\chi }_m$ is small and negative.Since ${\mu }_r=1+{\chi }_m$, then ${\mu }_r<1$.Thus, ${ϵ}_r>1$ and ${\mu }_r<1$. Option B fits these conditions.