How to get attribute value from ionic option

I have the following selection menu. I want to access attr.id in TypeScript -Class. Is it possible? I haven't found a way. friends

multidimensional array.

   <ion-item>
      <ion-label>Service</ion-label>
      <ion-select [(ngModel)]="selectService" name="service" (ionChange)="serviceSelected($event)">
               <ion-option selected disabled value="">Service auswählen:</ion-option>
                <ion-option *ngFor="let friend of friends" [attr.id]="friend[3]">{{friend[1]}}: {{friend[2]}} </ion-option> 
      </ion-select>
    </ion-item>

      

        
        
        
      

    

TS

serviceSelected(friend) 
{
  // How can I get the attribute "id" from the selected value here? 
}