What is the right course of action?

You correctly chose option 1, which says you may be the first to pass through the junction.

Here’s why this is correct according to German traffic rules: At this intersection, there is no traffic sign or signal giving right of way. The general rule at uncontrolled intersections is to give priority to the vehicle coming from the right. In this scenario, the red truck is on your left side, so you have right of way over it.

The cyclist, however, is coming from your right side, which normally means they would have priority. But here, the cyclist is turning left across your path, which means you going straight or turning right would have priority before the cyclist moves left.

Therefore, you may move first through the junction, then the red truck, and finally the cyclist. This is why allowing the red truck or cyclist to go first is not correct in this situation.

Remember: At an intersection without signs, the general rule is to give way to the right. However, turning movements can modify priority, especially when crossing paths. Understanding these nuances will help you correctly assess similar situations in the future.