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The incorrect relation for a diamagnetic material (all the symbols carry their usual meaning and $\varepsilon$ is a small positive number) is
A
$\mu<\mu_0$
B
$0\le\mu_r<1$
C
$-1\le\chi<0$
D
$1<\mu_r<1+\varepsilon$
Detailed Solution
For diamagnetic material, $0\le\mu_r<1$ and $\chi=\mu_r-1\Rightarrow -1\le\chi<0$; also $\mu_r=\mu/\mu_0<1\Rightarrow \mu<\mu_0$. Option (d), $1<\mu_r<1+\varepsilon$, describes a paramagnetic material, so it is the incorrect relation for diamagnetism.