如何在angular typescript的输入单选中取消选择先前设置的选项

<mat-radio-group [(ngModel)]="selectedOption">
  <mat-radio-button *ngFor="let option of options" [value]="option">{{ option }}</mat-radio-button>
</mat-radio-group>

selectedOption: string;

this.selectedOption = null; // 或者 this.selectedOption = '';

<mat-radio-group [(ngModel)]="selectedOption">
  <mat-radio-button *ngFor="let option of options" [value]="option">{{ option }}</mat-radio-button>
</mat-radio-group>
<button (click)="clearSelection()">取消选择</button>

selectedOption: string;
options: string[] = ['选项1', '选项2', '选项3'];

clearSelection() {
  this.selectedOption = null; // 或者 this.selectedOption = '';
}