I have code like this
function echoSelect($name, $value, $choices)
{
$output = "<select name='{$name}'>";
foreach( $choices as $k => $v)
{
$output .= "<option value='{$v}'";
if ($value == $v) $output .= ' selected';
$output .= ">{$k}</option>";
}
$output .= '</select>';
echo $output;
}//echoSelect
//so your code would call:
echoSelect('dropName', $dropName, array('A','B','C','X','Y','Z'));