/TypeScript/How to set value of multiselect dropdown for reactive forms in angular 6

How to set value of multiselect dropdown for reactive forms in angular 6

      
        content_copy
      
      <select multiple name="countries" [formControl]="countryControl">
  <option *ngFor="let country of countries" [ngValue]="country">
    {{ country.name }}
  </option>
</select>

Source: angular.io

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