angularjs - How hide options in select list angular? -

there object:

0 : { id : 1, value : 2}, 1 : { id : 2, value : 3} 

and select list:

<select id="sec">   <option value="1"></option>   <option value="1"></option>   <option value="3"></option> </select> 

how hide option in id="sec" after click option id = 2 first select. so, show only:

<option value="1"></option> <option value="1"></option> 

i tried add ng-model="selectlist" ng-change(selectlist) selected value. how compare seleted value object , hide options second select?

my own solution is:

<?= form_dropdown('specialization', $speccategory['name'], array(), 'ng-model="specialization"');?> <select ng-model="doctors" name="doctor"> <option ng-show="specialization == {{value.usersspecializationidspecialization}}" value="{{value.usersworkspaceiduser}}" ng-repeat="(key, value) in options">{{value.detailtousersname}}</option> </select> 

i hope set me plus point :)