The driver of a passenger car is forced to transport a sick person on an emergency service; what lights must they have switched on?

A)Hazard lights.Correct
B)High beams.
C)Position lights.
If, as a result of especially serious circumstances, the driver of a non-priority vehicle is forced, without being able to resort to other means, to perform a service of those normally reserved for priority vehicles, they shall ensure that other users notice the special situation in which they are driving, using the horn intermittently and switching on the hazard lights, if available, or waving a handkerchief or similar procedure. In any case, traffic rules must be respected, especially at intersections.