MCQ
Correct configuration of the following is


- ✓$2S$, $3S$
- B$2S$, $3R$
- C$2R$, $3S$
- D$2R$, $3R$


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$\mathrm{Cr}_2 \mathrm{O}_7^{2-}+\mathrm{XH}^{+}+\mathrm{Ye}^{-} \rightarrow 2 \mathrm{~A}+\mathrm{ZH}_2 \mathrm{O}$
$\mathrm{X}, \mathrm{Y}, \mathrm{Z}$ and $\mathrm{A}$ are respectively are: