Optically active compound is
$3-$chloropentane
$2-$chlorobutane
$2-$chloropropane
None of these
The letter ‘$D$’ in carbohydrates represents
$A + B , A$ and $B$ are
The binaphthol $(Bnp)$ is
Separating of $d$ and $l$ enantiomorphs from a racemic mixture is called
Number of chiral centre in the given compound is