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The oxidation states of nitrogen in the following equations are
$ 4[NH_{3}OH]^{+} (X) \rightarrow N_{2}O (Y) +2NH_{4}^{+} (Z) +2H^{+}+3H_{2}O $
X Y Z

+1, 0, -3
-1, 1, -2
-1, -2, -3
-1, 1, -3
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