MCQ
What are the configuration of the two chiral centre?


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

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$\begin{array}{*{20}{c}}
{{{\left( {{C_2}{H_5}} \right)}_2}NC{H_2}CH \cdot COOH} \\
{\,\,\,\,\,\,\,|} \\
{\,\,\,\,\,\,\,Cl}
\end{array}$
is :
$\xrightarrow[{{H_2}O}]{{B{r_2}}}$