The \( B-H \) curves \( a \) and \( b \) shown in the figure are associated with (A) a diamagnet...

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The \( B-H \) curves \( a \) and \( b \) shown in the figure are associated with
(A) a diamagnetic and a paramagnetic substance, respectively.
(B) soft iron and steel, respectively.
(C) a paramagnetic and a ferromagnetic substance, respectlvely.
(D) steel and soft iron, respectively.
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