MCQ
Product obtained in the reaction is


- ✓Diastereomer
- BRacemic
- CMeso
- DOptically pure enantiomer


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$\mathrm{A}$ and $\mathrm{Y}$ are respectively
$[A]$ $\mathrm{Cr}_2 \mathrm{O}_3, \mathrm{BeO}, \mathrm{SnO}, \mathrm{SnO}_2$
$[B]$ $\mathrm{Cr}_2 \mathrm{O}_3, \mathrm{CrO}, \mathrm{SnO}, \mathrm{PbO}$
$[C]$ $\mathrm{NO}, \mathrm{B}_2 \mathrm{O}_3, \mathrm{PbO}, \mathrm{SnO}_2$
$[D]$ $\mathrm{ZnO}, \mathrm{Al}_2 \mathrm{O}_3, \mathrm{PbO}, \mathrm{PbO}_2$