Why doesn't the answer below display Latex?
(I'm using PGML if that matters.)
$menu = PopUp(["select one",
"[`p_c > p_b`]",
"[`p_c < p_b`]",
"[`p_c = p_b`]"],
"[`p_c < p_b`]");
I don't believe that parserPopUp supports LaTeX in menu items. When I need that I fall back to the older checkbox_multiple_choice (see, e.g., http://webwork.maa.org/wiki/MultipleChoiceProblems), which does support LaTeX formatting. This doesn't really work for inline drop-downs, but works fine in other respects.
Gavin