How to remain active on a timed gameobject

Hello im making a simple trivia game and im trying to remain the gameobject active when the correct answer is clicked. The problem is the correct answer is active only for a second then is inactive then the next answer is active. How can I get it to remain active when gameobject is chosen no matter the time limit?

Game Manager Script

 public GameObject[] anw;
 int index;
 private float timeBtwAct;
 public float startTimeBtwAct;
 public float actWait;

 
 void Start()
 {
     timeBtwAct = startTimeBtwAct;
     for (var i = 0; i < anw.Length; i++)
         anw[i].SetActive(false);
 }

 void Update()
 {
     if (timeBtwAct <= 0)
     {
         index = Random.Range(0, anw.Length);

         for (var i = 0; i < anw.Length; i++)
             anw[i].SetActive(false);

         anw[index].SetActive(true);

         timeBtwAct = actWait;
     }
     else
     {
         timeBtwAct -= Time.deltaTime;
     }
 }

GameObject script function when clicked

 void OnMouseDown()
 {
     gameObject.SetActive(true);
     AudioSource.PlayClipAtPoint(clip, transform.position);
     GetComponent<Animator>().enabled = true;
 }