здесь пример для вас .ts
months: string[] = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'];
constructor()
{
this.selected_month="Feb";
}
}
в html
<select class="form-control search-head" [(ngModel)]="selected_month">
<!-- <option disabled value="1" [selected]=true>Choose Category</option> -->
<option [value]="m" *ngFor="let m of months">{{m}}
</option>
</select>