Any alternate to accommodate values than ng-value..?

I have code like below.

      <li ng-repeat="quest in Questions">
        <div ng-repeat="choice in quest.jawaban" ng-init="answer[]=quest.selected">
      <input type="radio"  ng-model="answer[]" ng-value="'{{choice.pil}}'" name="{{}}">

i need more value on ng-value like ng-value="’{{choice.pil}}~{{choice.jawaban}}~etc’", because i need to deliver to my API for save data if user click “next” button.
example on
its running good, radio button default value checked prefect, but only one variable. I need more like ‘{{choice.pil}}~{{choice.jawaban}}~{{bla}}~{{bla}}’ on ng-value.

thank you