In angular ng-repeat breakes the options into options again

my js array is [“standard”, “premium”]

When I click on the dropdown option for the first time , its showing option as standard and premium. After choosing any one of them the choosen values is not displayed in the box. If I do click again (assume I have selected standard in the first go)then its giving options as s,t,a,n,d,a,r,d .

my code is

<select id = "red", ng-model="red" class= "form-select">
<option ng-repeat=" r in red">[[red]]</option>
</select>