Using knockout.js, below code for unselect all radio buttons in a list
$("input[type='radio']").checkboxradio();
$("input[name^='rbtnShift']").attr("checked", false).checkboxradio("refresh");
Use below code for dynamically selecting a radio buttons in a list,
$("input[type='radio']").checkboxradio();
$("input[name=rbtnShift][value=" + 1 + "]").prop('checked', true);
$("input[name^='rbtnShift']").attr("checked", true).checkboxradio("refresh");