Remove all options

How Do I...
#1

A want to clear/remove all options inside the selection2.
I did try:


        $(".select2-data-1").select2({
           data:  null
         })
        $(".select2-data-1").select2({
           data:  []
         })

and

 $(".select2-data-1").val(null)

Dint work;

#2

I did it by remove from the select;