\define\ansblank{\inright{\getnumber[itemgroup:itemize]. \thinrule}}
\setupitemgroup [itemize] [n, style=bold,right=\ansblank]
\starttext
\startitemize[n]
\item A question.
\stopitemize
\showframe
\stoptext
When I source context 2016.02.15 it works, but not with 2016.05.19. Thank you for any help on the new way.