In angular, ng-repeat breaks the options into options again

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

When I click on the dropdown option for the first time, it’s showing option as standard and premium. After choosing any one of them the chosen values is not displayed in the box. If I do click again (assume I have selected standard in the first go) then it’s 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>