How do I instantiate a prefab B in same place prefab A?

Questions & Answers
1

I click once to instantiate A, then I click again so that B is instantiated in the same place where I have begotten A. I tried this code but it did not work.

if (AmountA > 0 && StateMouse == 0)
                {
                Instantiate(PrefabA, LocalItem.position, LocalItem.rotation);  //Ok, He left the correct place, and is on the scene.		
		AmountA--; 
                }
				
                StateMouse++;
				
                if (StateMouse == 2)// new click, instance B
                {		
                   StateMouse = 0;
                   Rigidbody ne = GameObject.Instantiate(PrefabB, PrefabA.transform.position, PrefabA.transform.rotation) as Rigidbody; //<<<Wrong place 
                   GameObject.Destroy(PrefabA);	// Destroy A			
                   
                }
2

GameObject a;

void Update()

if (AmountA > 0 && StateMouse == 0)
                {
                a = (GameObject)Instantiate(PrefabA, LocalItem.position, LocalItem.rotation);  //Ok, He left the correct place, and is on the scene.
                AmountA--; 
                }

                StateMouse++;

                if (StateMouse == 2)// new click, instance B
                {     
                   StateMouse = 0;
                   Rigidbody ne = GameObject.Instantiate(PrefabB, a.transform.position, PrefabA.transform.rotation) as Rigidbody; //<<< right place 
                   Destroy(a); // Destroy A         

                }