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A compound contains \( \mathrm{X}, \mathrm{Y} \) and \( \mathrm{Z} \) atoms. The
P oxidation states of \( \mathrm{X} \) are \( +\mathrm{a}, \mathrm{Y} \) is \( -\mathrm{b} \) and \( \mathrm{Z} \) is \( -\mathrm{c} \).

W The molecular formula of the compound is \( \mathrm{X}_{\mathrm{m}} Y_{n} Z_{\mathrm{r}} \). Therefore, among the given relations, which one is correct?
(1) \( a m+b n+c r=0 \)
(2) \( a m+b n=c r \)
(3) \( \mathrm{am}+\mathrm{cr}=\mathrm{br} \)
(4) \( b n+c r=a m \)
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