<h2>Names</h2>
<div *ngFor="let user of users | async">{{ user.name }}</div>
<h2>Ages</h2>
<div *ngFor="let user of users | async">{{ user.age }}</div>
<h2>Genders</h2>
<div \*ngFor="let user of users | async">{{ user.gender }}</div>
- None. The async pipe does not subscribe automatically.
- None. The template syntax is not correct.
- Three. There is one for each async pipe.
- One. The async pipe caches Observables by type internally.