At which traffic sign at the next junction do you generally have right of way?

You selected answer 1, which is correct. The first traffic sign warns of a junction where you are on the priority road. This means you have right of way at the next intersection, unless otherwise regulated by other signs. The second sign warns of an intersection, but it does not give you any right of way—here, the general rule "right before left" applies. The third sign regulates narrow roads and priority when meeting oncoming traffic, not right of way at a junction. Remember: when you see the sign in answer 1, you generally have right of way at the next junction.