角* ngFor FormArray作为单选按钮

Question

目标是用户通过单击按钮将答案推送到FormArray的答案，而* ng用于单选按钮div选择正确的答案。想要只有输入和按钮元素来推动并将答案呈现给收音机组。麻烦您正确设置formarray部分...谢谢

TS

strncpy()

HTML

questionForm: FormGroup;
answers: FormArray;


this.questionForm = this.fb.group({
      answers: this.fb.array([this.createItem()]),
      correct: ['', [Validators.required]]
    });

createItem(): FormGroup {
    return this.fb.group({
      data: ['', [Validators.required]],
      color: ['danger']
    });
  }

addAnswer() {
  this.answers = this.questionForm.get('answers') as FormArray;
  this.answers.push(this.createItem());
}