How many carbon atoms in the molecule $HCOO - {(CHOH)_2} - COOH$ are asymmetric
$1$
$2$
$3$
None of these
Which of the following compound is non-resovable (meso) compounds ?
Among the following, the Newmann projections of meso- $2, 3$ -butanediol are
Which of the following is erythro form and optically active ?
Which one of the following pairs represents stereoisomerism
Which of the following molecules are chiral ?