Increase index of an Array

Unity Engine
1

I have an array of gameobjects, and want to activate one with index 0, and after a tap of a button, the gameobject with index 0 gets hidden, and the one with index 1 gets active and so on.

public GameObject[] QuestionList;
 private int QuestionsArrayIndex;

public void Start()
    {
        QuestionsArrayIndex = 0;
        QuestionList[QuestionsArrayIndex].SetActive(true);
        Shuffle();
    }

public void ScreenTap()
         {

       

        if (QuestionList[QuestionsArrayIndex].activeInHierarchy)
                {

            QuestionsArrayIndex++;
            QuestionList[QuestionsArrayIndex].SetActive(false);

                }

        }
2 
QuestionList[QuestionsArrayIndex].SetActive(false);
QuestionsArrayIndex++;
QuestionList[QuestionsArrayIndex].SetActive(true);
3

Oh my god! Thank you, it works