Instantiate a game object in array then change parent

I am using a mouse click to instantiate random game objects using an array. But I want these objects to have the parent to be Main Camera. I can't seem to get the transfrom.parent code correct. The objects just spawn as clones with no parent. Below is my code.

 var respawnPrefab : GameObject;
 var respawnPrefab1 : GameObject;
 var respawnPrefab2 : GameObject;
 var respawn : GameObject;
 //var loopHandle : boolean = true;
 var wanttobeparent : GameObject;
 
 
 function Start()
 {
     
     if (respawn==null) 
         respawn = GameObject.FindWithTag ("Respawn");
 }
 
 function Update()
 {
 
 var objs = new GameObject[3];
 
 objs[0] = respawnPrefab;
 objs[1] = respawnPrefab1;
 objs[2] = respawnPrefab2;
 
 
 if (Input.GetKeyDown (KeyCode.Mouse0))
     { 
      
      GameObject go = Instantiate(objs[(Random.Range(0, objs.Length))], respawn.transform.position, respawn.transform.rotation) as GameObject;
      go.transform.parent = Camera.main.transform;
      
     }
 }