Ferrimagnetism is in : (a) \( \uparrow \uparrow \uparrow \uparrow \uparrow \) (b) \( \uparrow \d...

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Ferrimagnetism is in :
(a) \( \uparrow \uparrow \uparrow \uparrow \uparrow \)
(b) \( \uparrow \downarrow \uparrow \downarrow \)
(c) \( \uparrow \uparrow \uparrow \downarrow \downarrow \)
(d) none of these
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