void InstanceButtons()
    {
        foreach (Transform child in transform)
        {
            if (child.CompareTag("Answer Button"))
            {
                ButtonAnswer buttonAnswer = child.GetComponent <ButtonAnswer>();
                if (buttonAnswer)
                {
                    buttons.Remove(buttonAnswer);
                }
                Destroy(child.gameObject);
            }
        }

        // Instance Buttons in its correct position

        float   offsetX  = -((answersSeparation * ((float)GameManager.instance.maxAnswers - 1f)) * 0.5f);
        Vector2 position = new Vector2(offsetX, 0);

        for (int i = 0; i < GameManager.instance.maxAnswers; ++i)
        {
            // Instantiate Button Back
            GameObject buttonBack = Instantiate(buttonBackPrefab, transform);
            buttonBack.GetComponent <RectTransform>().anchoredPosition = position;

            // Instantiate Button
            ButtonAnswer button = Instantiate(buttonPrefab, transform).GetComponent <ButtonAnswer>();
            button.answersPanel = this;
            button.GetComponent <RectTransform>().anchoredPosition = position;
            button.ChangeText(GameManager.instance.answersList[i].ToString());
            buttons.Add(button);

            position.x += answersSeparation;

            if (i == GameManager.instance.correctAnswerIndex)
            {
                correctButton = button;
            }
        }
    }