state object for Quiz app

class App extends Component {

  constructor(props) {
    super(props);

    this.state = {
      counter: 0,
      questionId: 1,
      question: '',
      answerOptions: [],
      allQuestions : [],
      answer: '',
      selectedAnswers : {},
      result: ''
    };
    this.setNextQuestion = this.setNextQuestion.bind(this);
    this.setPreviousQuestion = this.setPreviousQuestion.bind(this);
    this.handleAnswerSelected = this.handleAnswerSelected.bind(this);
    this.viewreults = this.viewreults.bind(this);
  }
}