An `S_(N^(2))` reaction at an asymmetric carbon of a dextro-alkyl halide always gives

Options

A. a laevo product
B. a racemic mixture
C. a single optically active isomer
D. None of these

Answer

C

Explanation

In `S_(N^(2))` reaction, inversion of configuration takes place. Since reactant and product are not enantiomers, the sign of the optical rotation may not change, hence a single stereoisomer is obtained.