What must you do in this situation?

In this situation, you see a flagman standing at a railway level crossing with a signal flag. According to German traffic rules, when a flagman is present and signaling at a level crossing, you must stop and wait in front of the crossing, even if the barriers are open and no train is immediately visible. The flagman’s signal always takes priority for your safety. For this reason, answer 1, which tells you to stop in front of the level crossing, is correct. It is not permitted to drive past the flagman on either side. Always obey signals from railway personnel to avoid hazards.