First Radio button should got selected of every radio group

Question

<div ng-app="app" >
    <div ng-controller="ctrl">

Type(Bx/ Nx / Ax): <input type="text" ng-model="checkPrice">
        <div ng-repeat="buses in BusArray">
        <span>group{{$index+1}}</span>
        <form>
      <div ng-repeat="bus in dd=(buses|filter:checkPrice)">
    <label style="font-size:12px; background-color:green; padding:2px;">
                <input name="{{$parent}}" id="{{$parent.$index}}{{$index}}" type="radio" ng-checked="bus.IsSelected" ng-click="setSelected(buses,bus)" />
                {{bus|json}}
               </label>

            </div>
              </form>
            <div>
        </div>

        <hr/>

    </div>
       {{BusArray | json}}
</div>

//
var ngApp = angular.module('app', []);

ngApp.controller('ctrl',function($scope){

$scope.setSelected = function ($data, $pData) {
        angular.forEach($data, function (cu) {
                cu.IsSelected = false;
        });
      $pData.IsSelected = true;
    };
    $scope.BusArray = [
    [{

        "BusName": "Ax. Travels",
        "Origin": "DEL",
        "Destination": "JAI",
        "TotalFare": 1200,
        "IsSelected": true
    }, {

        "BusName": "Bx. Travels",
        "Origin": "DEL",
        "Destination": "JAI",
        "TotalFare": 1600,
        "IsSelected": false
    }, {

        "BusName": "Bx. Travels",
        "Origin": "DEL",
        "Destination": "JAI",
        "TotalFare": 800,
        "IsSelected": false
    }, {

        "BusName": "Nx. Travels",
        "Origin": "DEL",
        "Destination": "JAI",
        "TotalFare": 400,
        "IsSelected": false
    }],
    [{

        "BusName": "Ax. Travels",
        "Origin": "DEL",
        "Destination": "JAI",
        "TotalFare": 1100,
        "IsSelected": true
    }, {

        "BusName": "Nx. Travels",
        "Origin": "DEL",
        "Destination": "JAI",
        "TotalFare": 1400,
        "IsSelected": false
    }, {

        "BusName": "Nx. Travels",
        "Origin": "DEL",
        "Destination": "JAI",
        "TotalFare": 600,
        "IsSelected": false
    }, {

        "BusName": "Bx. Travels",
        "Origin": "DEL",
        "Destination": "JAI",
        "TotalFare": 500,
        "IsSelected": false
    }]
];


});