Quiz game with images

I want to make a quiz game with both text and images in it. I tried declaring the public sprite image field but i don't know how to exactly put it in the code... I searched the web for it but I could not find any helpful hints. I also tried using the Resource.load idea but I will have too many images. I want to have images for both question and answer... here is the code using UnityEngine; using UnityEngine.UI; using System.Collections;

public class Answer : MonoBehaviour {

 public Sprite image;  
 public int idLevel;
 public Text Question;
 public Text AnswerA;
 public Text AnswerB;
 public Text AnswerC;
 public Text AnswerD;
 public Text infoAnswer;
 public string[] questions;
 public string[] alternativeA;
 public string[] alternativeB;
 public string[] alternativeC;
 public string[] alternativeD;
 public string[] corrects; 
 private int idQuestion; 
 private float points; 
 private float ques; 
 private float correct; 
 private int Finish; 

 // Use this for initialization
 void Start () {
     idLevel = PlayerPrefs.GetInt("idLevel");
     idQuestion = 0;
     ques = questions.Length;

     Question.text = questions[idQuestion];
     AnswerA.text = alternativeA[idQuestion];
     AnswerB.text = alternativeB[idQuestion];
     AnswerC.text = alternativeC[idQuestion];
     AnswerD.text = alternativeD[idQuestion];
 
     infoAnswer.text = "Correct Answers "+correct.ToString () + " of " + ques.ToString()+ " Questions.";

     DontDestroyOnLoad (this);
     ad.RequestInterstitial ();
 }
 
 public void Answersall(string alternative){

     if (alternative == "A") 
     {
         if(alternativeA[idQuestion] == corrects[idQuestion])
         {
             correct += 1;
         }
     }

     else if (alternative == "B")
     {
         if(alternativeB[idQuestion] == corrects[idQuestion])
         {
             correct += 1;
         }
     }

     else if (alternative == "C") 
     {
         if(alternativeC[idQuestion] == corrects[idQuestion])
         {
             correct += 1;
         }
     }

     else if (alternative == "D") 
     {
     if(alternativeD[idQuestion] == corrects[idQuestion])
         {
             correct += 1;
         }
     }

     nextQuestion ();
 }

 public void nextQuestion()
 {
     idQuestion += 1;

     if (idQuestion <= (ques- 1)) 
     {
         Question.text = questions [idQuestion];
         AnswerA.text = alternativeA [idQuestion];
         AnswerB.text = alternativeB [idQuestion];
         AnswerC.text = alternativeC [idQuestion];
         AnswerD.text = alternativeD [idQuestion];

         infoAnswer.text = "Correct Answers "+correct.ToString () + " of "+ques.ToString()+ " Questions.";
     }

     else
     {
         points = 100 * (correct / ques);
         Finish = Mathf.RoundToInt(points);

         if (Finish > PlayerPrefs.GetInt ("Finish" + idLevel.ToString ())) 
         {
             PlayerPrefs.SetInt ("Finish"+idLevel.ToString(), Finish);
             PlayerPrefs.SetInt ("correct"+idLevel.ToString(), (int)correct); 
         }


         PlayerPrefs.SetInt ("FinishTemp"+idLevel.ToString(), Finish);
         PlayerPrefs.SetInt ("correctTemp"+idLevel.ToString(), (int)correct); 

         Finishhh ();
     }
         
 }

 public void Finishhh(){
     
     Application.LoadLevel ("Finish");
 }

}