MCQ
$\mathop {\boxed{{C_4}{H_9}Cl}}\limits_{Optically\,Active}^{Compound\,A} \xrightarrow[{DMSO}]{{NaCN}}$ $[R]-2-$ methyl Butane Nitrile ; Identify compound $'A'$ ?
- ✓

- B

- C

- D






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