A pair of stereoisomers might be classified in various ways. Which of the following statement are true with respect to pairs of stereoisomers?
$(a)$ They might be configurational isomers $(b)$ They might be diastereomers
$(c)$ They might be constitutional isomers $(d)$ They might be tautomers
$(e)$ They might be conformational isomers $(f)$ They might be enantiomers
$(g)$ They might be positional isomers
$a, b, c, e$
$b, d, e, f, g$
$a, b, f$
$a, b, c, f$
Among the following which one can have a meso form?
Which of the following acids does not exhibit optical isomerism?
$C{H_3}CH(OH).COOH$ shows
The configurations of the chirality centres in $D-$ threose (shown) are
A similarity between optical and geometrical isomerism is that