在Angular中，用户只能选中一个复选框而不是多个复选框，这是如何实现的呢？

<form [formGroup]="form">
  <div formGroupName="selectedOption">
    <label *ngFor="let option of options">
      <input type="radio" [value]="option.value" formControlName="option">
      {{ option.label }}
    </label>
  </div>
</form>

import { Component, OnInit } from '@angular/core';
import { FormBuilder, FormGroup } from '@angular/forms';

@Component({
  selector: 'app-example',
  templateUrl: './example.component.html',
  styleUrls: ['./example.component.css']
})
export class ExampleComponent implements OnInit {
  form: FormGroup;
  options = [
    { label: 'Option 1', value: 'option1' },
    { label: 'Option 2', value: 'option2' },
    { label: 'Option 3', value: 'option3' }
  ];

  constructor(private formBuilder: FormBuilder) { }

  ngOnInit() {
    this.form = this.formBuilder.group({
      selectedOption: this.formBuilder.group({
        option: ''
      })
    });
  }
}