Réinitialiser le bouton radio jQuery
$('input[name="correctAnswer"]').prop('checked', false);
surati_coding
$('input[name="correctAnswer"]').prop('checked', false);$("[name=color]").removeAttr("checked");
or
var presetValue = "black";
$("[name=color]").filter("[value='"+presetValue+"']").prop("checked",true);