无法在Angular.js中使用ng-repeat设置默认选中单选按钮的选项

<div ng-app="myApp" ng-controller="myCtrl">
  <div ng-repeat="option in options">
    <input type="radio" ng-model="selectedOption" ng-value="option.value" ng-checked="option.value === selectedOption">
    {{ option.label }}
  </div>
</div>

<script>
  var app = angular.module('myApp', []);
  app.controller('myCtrl', function($scope) {
    $scope.options = [
      { label: 'Option 1', value: 'option1' },
      { label: 'Option 2', value: 'option2' },
      { label: 'Option 3', value: 'option3' }
    ];
    $scope.selectedOption = 'option2'; // 设置默认选中的选项值
  });
</script>