unity - How to check if a specific instance of a prefab is pressed?

This one is hard to explain, so I'll show the code first -

for (var i = 0; i < Input.touchCount; ++i)
{
    if (Input.GetTouch(i).phase == TouchPhase.Began)

    {
        Ray ray = Camera.main.ScreenPointToRay(Input.GetTouch(i).position);
        RaycastHit2D hit = Physics2D.Raycast(ray.origin, ray.direction);

        if (hit)
        {
            clicksNeeded -= 1;
            GetComponentInChildren().text = "" + clicksNeeded;
            Debug.Log(clicksNeeded);
            print("was a hit");

        }
    }
}

I need to check if hit touches the specific game object that the script is linked to, as at the moment if any of the circles are clicked, clicksneeded -= 1 to all objects currently instantiated.

Thanks for the help!