- The oxoanion which contains all equivalent \( M-\mathrm{O} \) bond is : (I) \( \mathrm{CrO}_{4...

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- The oxoanion which contains all equivalent \( M-\mathrm{O} \) bond is :
(I) \( \mathrm{CrO}_{4}^{2-} \)
(II) \( \mathrm{MnO}_{4}^{-} \)
(III) \( \mathrm{Cr}_{2} \mathrm{O}_{7}^{2-} \)
\( \mathrm{P} \)
(a) III only
(b) I, II, III
(c) I, II
(d) I only
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