i wanted to build a quiz game that has a 30 questions including 30 pictures as well. like 1 question is equal to 1 picture. so that the question is based on the picture display

using UnityEngine.UI; using UnityEngine.SceneManagement;

public class GameManager : MonoBehaviour {

 //public Sprite[] pics;
 //private Image imagePic;

 //private List<Sprite> images;
 //private Image factImage; 
 //private Question pictures;
 //private static List<Question> unpictures;
 //private Question currentpicture;
 //[SerializeField]
 //private Image factimage;

 public Question[] questions;
 private static List<Question> unansweredQuestions;
 private Question currentQuestion;
 [SerializeField]
 private Text factText;
 [SerializeField]
 private float TimeBetweenQuestions = 1f;

 void Start()

 {
     
     if (unansweredQuestions == null || unansweredQuestions.Count == 0) 
     {
         unansweredQuestions = questions.ToList<Question> ();
     } 
     SetRandomQuestion ();
         
 }
     
 //void SetPicture()
 //{
 //    int count = unansweredpictures.Count;
 //    int index = Random.Range (0, count);

 //    Debug.Log ("picture1");
     //unansweredpictures.sprite = unansweredpictures [index];
     //image1.sprite = pics [index];

 //}
 void SetRandomQuestion ()
 {
     int randomQuestionIndex = Random.Range (0, unansweredQuestions.Count);
     currentQuestion = unansweredQuestions [randomQuestionIndex];


     factText.text = currentQuestion.fact;


 //    int randomindex = Random.Range (0, unpictures.Count);
 //    currentpicture = unpictures [randomindex];

     //factimage.canvasRenderer<Sprite> = currentpicture.fact;
 }

 IEnumerator TransitionToNextQuestion ()
 {
     unansweredQuestions.Remove (currentQuestion);
     //unpictures.Remove (currentpicture);

     yield return new WaitForSeconds (TimeBetweenQuestions);

     SceneManager.LoadScene (SceneManager.GetActiveScene ().buildIndex);    
 }

 public void UserSelectTrue()
 {
     if (currentQuestion.isTrue) {

         Debug.Log ("Correct");


     } else 
     {
         Debug.Log ("Wrong");
     }
     StartCoroutine (TransitionToNextQuestion ());
 }

 public void UserSelectFalse()
 {
     if (!currentQuestion.isTrue) {

         Debug.Log ("Correct");
     } else 
     {
         Debug.Log ("Wrong");
     }
     StartCoroutine (TransitionToNextQuestion ());
 }

}