Can we create child game object of an other game object?

Unity Engine
,
1

Hi,
I want to Instantiate a game object A as a child of game object B. Is it possible? Waiting your positive reply;
Thanks;

2 
gameObjectB = (GameObject) Instantiate(gameObjectBPrefab);

gameObjectB.transform.parent = gameObjectA.transform;
3

thanks

this is what i need