how to delete only one clone of a game object..

Question

I am developing an android math game it involves the use of coin with a value on it.  i am wondering wondering what will i do in order to delete
only one object in my game

for example if i have coin1(clone) and coin1(clone)(clone)..

if i click coin1(clone)(clone) it will be destroyed. but in my case

, when i click coin1(clone)(clone), coin1(Clone) is deleted,  i was wondering what will i do in order to delete only one object.

PS. the game object has a same value on it

void NumberOfSelectedCoins()

{

  Debug.Log (BlueCoinScript.b);

if(SelectedCoins.cntCoins%BlueCoinScript.b == 0)

{

for (int n=0;n<selectC.selectedNumCoins.Count; n++)

{

Destroy(selectC.selectedNumCoins[n]);

TotalSum.totalValue = 0;

SelectedCoins.breakPointsCount++;

}

breakpointsText.text = SelectedCoins.breakPointsCount.ToString ();

selectC.selectedNumCoins.Clear();

}

}

also if you have 1 game object and you cloned it so that you can have 3 same game objects,

how can you identify that when you clicked that game object, that game object is clone1 or clone2 or clone3

thx for the help