How to show selected options only if item is selected in select? I have created a select option for Province which has values of #1, #2, #3

and I have created a second select for Municipality with values #4,#5,#6,#7,#8,#9,#10,#11,#12

If I select #1 in Province I want to show #4,#5,#6 in Municipality select only.

Can this be achieved? If so how?
You may use Reference field option limit module to accomplish this 
task


  This module allows reference fields of several types to have their widgets' available options limited by the values of other fields in the current entity.