Question $16($Mandatory$)(1$ point$)$

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$C{r}_2{O}_7^{2-}(aq)+I^{-}(aq)C{r}^{3+}(aq)+I{O}_3^{-}(aq)$

From the unbalanced equation above, what is the correct balanced half$-$reaction equation for the oxidation half$-$reaction in an acidic medium?

a$)C{r}_2{O}_7^{2-}(aq)+3e^{-}C{r}^{3+}(aq)$

b$)C{r}_2{O}_7^{2-}(aq)+6e^{-}+14H^{+}(aq)2C{r}^{3+}(aq)+7H_{2}O(aq)$

c$)I^{-}(aq)+3H_{2}O(l)I{O}_3^{-}(aq)+6e^{-}+6H^{+}(aq)$

d$)I^{-}(aq)I{O}_3^{-}(aq)+6e^{-}$