What must you watch out for now?

Your answer is fully correct because, according to German traffic rules, when approaching or making a turn, you must especially watch out for vulnerable road users such as cyclists. In this scenario, cyclists may be on either side of the vehicle—left or right—and can be less visible or quicker to move than motor vehicles. Being aware of cyclists on both sides is essential to ensure their safety and avoid accidents.

The rule of thumb is to continuously check mirrors and blind spots for cyclists or pedestrians before turning or changing lanes. The green car mentioned in option 3 is less critical in this context because the primary concern when turning is the safety of cyclists and pedestrians who are more vulnerable. Maintaining heightened attention to cyclists on both sides helps prevent collisions and complies with traffic safety regulations.