What is correct in this situation?

Your answer is correct because only traffic turning right may proceed in this situation.

This is indicated by the traffic light showing green on the right-turn lane and red for the other directions. In German traffic rules, vehicles may only move when the traffic light for their direction shows green. Here, the right-turn lane's green arrow allows vehicles in that lane to proceed, while the lanes for going straight and turning left have red lights, so they must stop.

Remember, even if the road ahead looks clear, you must always obey the traffic signal corresponding to your lane and direction. This ensures safe and orderly traffic flow.