JSFiddle - React, Tailwind, and code Playground

HTML

<div ng-app="myApp" ng-controller="MyCtrl">
    <select ng-option="value for (key , value) in options" ng-model="selected">
       <option value="">-Select-</option>
    </select>        
    <pre>{{options|json}}</pre>
</div>

JavaScript

angular.module("myApp",[]);
               
function MyCtrl($scope){

    $scope.options = {
"1st" : "first",
"2nd" : "second",
        "3rd" : "third"
    };
    
}