How to use variable inside variable in angular template?

I am new to angular , can someone tell me if I can use variable inside variable in angular.
Explaination:

I am creating one dropdown input component where it will make api call to get data.
There is an @Input() selector:string = "" which will tell what to select from data

Inside template it will run *ngFor loop, then inside html I want to display as kind of like that:

<option *ngFor="let item of data" [value]="item.id">
        {{ item.{{selector}} }}
 </option>

In other module it will be used as:

1. In one module <app-input [selector]="'name'"></app-input>
2. Another one. <app-input [selector]="'id'"></app-input>

How Can I use selector inside this any way?

>Solution :

{{ item[selector] }}

use the bracket syntax for accessing a property with a variable key.