Many browsers do not accept any independent style properties for 'option' elements,
and some do not respond to mouse events outside of the parent select element.
It won't hurt anything to set a curser style for an option, and in some browsers it will appear,
though it is sure to be confusing to mouse over several options with a constantly changing cursor.
with mouse events for each list item, and a hidden form element to send any selection- but that is a lot of work,
and it is even more work to make a thing like that keyboard accessible.