Generate random no and active that GO using array

In my game i want to show multiple images randomly. I just want to generate a random no and based on that active that specific one image (or deactivate other all). I am passing all images to an array.

This is what i have done so far

 using UnityEngine;
 using System.Collections;
 public class imagehandler : MonoBehaviour 
 {
     public GameObject[] images;
     public GameObject currentimage;
     int index;
     
     void Start()
     {
         images = GameObject.FindGameObjectsWithTag("image");
         index = Random.Range (0, images.Length);
         currentimage = images[index];
         Debug.log (currentimage.name);
     }
 }

need help for activation and deactivation part. Thanks