Which traffic sign gives right of way?

You answered correctly. Traffic sign 2 is the one that gives right of way. This sign indicates a priority road ahead, meaning that drivers on this road have the right of way over other traffic at intersections. Traffic sign 1 is a warning about a sharp curve, and traffic sign 3 is a place-name sign, typically marking the entrance to a town or village, and does not affect right of way. In German traffic rules, only the priority road sign relates to right of way, so you chose correctly. Remember, always look for this specific sign to know when you have priority at intersections.