Oxidation numbers of P in PO$_4^{3 - }$, of S in SO$_4^{2 - }$ and that of Cr in Cr2O$_7^{2 - }$ are respectively

Question

Oxidation numbers of P in PO$_4^{3 - }$, of S in SO$_4^{2 - }$ and that of Cr in Cr₂O$_7^{2 - }$ are respectively

+3, +6 and +5

+5, +3 and +6

$-$3, +6 and + 6

+5, +6 and +6

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