How could I show buttons if I am using array list?

I'm trying to make a quiz and I uses arraylist for random output of questions. I want to show buttons that will serve as the choices for my Questions how could I possibly do it? here is my code. Thank you!

void Start () { randomGen (); }

     void randomGen(){
                 ArrayList questionlist = new ArrayList ();
                 ArrayList choice1 = new ArrayList ();
                 ArrayList choice2 = new ArrayList ();
                 ArrayList calledCounters = new ArrayList ();
 
                 string[] questions = {"1","2","3","4","5","6","7","8","9","10"};
                 //string[] choice = {"A.Tinapa","B.Daing","C.Kangkong"};
                 //[] choices = {"A.kamote","B.kaldereta","C.suman"};    
 
 
 
         int counter = 0;
         do{
 
             int x= Random.Range(0,questions.Length-1);
 
 
             if(!isExisting(x,calledCounters)){
                 calledCounters.Add(x);
                 questionlist.Add(questions[x]);
                 //choice1.Add (choice[x]);
                 //choice2.Add(choices[x]);
 
                 Debug.Log (x);
                 Debug.Log(questionlist[counter]);
                 Debug.Log(choice1[counter]);
                 Debug.Log(choice2[counter]);
                 counter++;
             }
 
 
 
         }while(counter<=2);
 
     }
 
 
     bool isExisting(int y, ArrayList x){
                 bool status = false;
                 for (int g=0; g<x.Count; g++) {
                         if (x.Contains (y)) {
                                 status = true;
                                 break;
                         }
 
                 }
                 return status;
         }
 
 
 
 
     // Update is called once per frame
     void Update () {
 
     
     }