In the conversion of \( \mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7} \) to \( \mathrm{K}_{2} \m...

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In the conversion of \( \mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7} \) to \( \mathrm{K}_{2} \mathrm{Cr}_{4} \) the oxidation number of chromium:
(A) increases
(B) decreases
(C) remains the same
(D) none of these
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