<h3>{{button.title}}</h3>
<div>
  <span *ngFor="let choice of choices">
    <input type="radio" [name]="button.name" [value]="choice.value" [id]="choice.id" [(ngModel)]="selected">
    <label [for]="choice.id">{{choice.value}}</label>
  </span>
</div>
